Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on July 28, 1976.
As of Friday, December 27th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

ModelsModification
1975-1976 Catalyst equipped vehicles EXCEPT those with backpressure modulated EGRChrysler heat control valve and GM early fuel evaporative valve may be removed

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-67
  • Executive Order 67 / D67
  • ARB # D-67
  • Executive Order No: D-67
  • C.A.R.B. No. D-67
  • Resolution D-67
For Free CARB Executive Order Status verification, email an image of the device Executive Order label as well as the Year/Make/Model and Test Group # of the vehicle to [email protected]

Download: Executive Order D-67 PDF

D-67 Document:

CARB_D-67

State of California AIR RESOURCES BOARD EXECUTIVE ORDER D—67 Relating to Exemptions under Section 27156 of the Vehicle Code CRAGAR INDUSTRIES, INC. "HOT PIPES" TUBING EXHAUST HEADERS Pursuant to the authority vested in the Air Resources Board by Section — 27156 of the Vehicle Code; and Pursuant to the authority vested in the undersigned by Section 39515 of the Health and Safety Code and Executive Order G—30A; IT IS ORDERED AND RESOLVED: That the installation of the "Hot Pipes" tubing exhaust headers manufactured by Cragar Industries, Inc., 19007 S. Reyes Avenue, Compton, California 90224 has been found to not reduce the effectiveness of required motor vehicle pollution control devices and, therefore, is exempt from the prohibitions of Section 27156 of the Vehicle Code for 1975 and 1976 model—year vehicles originally equipped with catalytic converters except those vehicles originally equipped with back—pressure modulated exhaust gas recirculation systems (i.e. certain Ford, Pontiac and Oldsmobile vehicles). All emission control systems shall be retained except the manifold heat control valve on Chrysier . Corporation vehicles and the early fuel evaporation (EFE) valve on 1976 General Motors vehicles. The conversion of single exhaust systems tohqu?l exhaust systems shall not be permitted on catalyst equipped vehicles. — This Executive Order is valid provided that installation instructions for this device will not recommend tuning the vehicle to specifications different from those listed by the vehicle manufacturer. Changes made to the design or operating conditions of the device, as exempted by the Air Resources Board, that adversely affect the per— formance of a vehicle‘s pollution control system shall invalidate this Executive Order. — Marketing of this device using an identification other than that shown in this Executive Order or marketing of this device for an application other than those listed in this Executive Order shall be prohibited unless prior approval is obtained from the Air Resources Board. This Executive Ordgr does not constitute any opinion as torthe effect ?hat‘the use of this device may have on any warranty either expressed or implied by the vehicle manufacturer. [

THIS EXECUTIVE ORDER DOES NOT CONSTITUTE A CERTIFICATION, ACCREDITATION, APPROVAL, OR ANY OTHER TYPE OF ENDORSEMENT BY THE AIR RESQURCES BOARD OF ANY CLAIMS OF THE APPLICANT CONCERNING ANTI—POLLUTION BENEFITS OR ANY ALLEGED BENEFITS OF THE "HOT PIPES" TUBING EXHAUST HEADERS. ‘No claim of any kind, such as "Approved by Air Resources Board" may be made with respect to the action taken herein in any advertising or other oral or written communication. Section 17500 of the Business and Professions Code makes untrue or mis— leading advertising unlawful, and Section 17534 makes violation punishable as a misdemeanor. Section 43644 of the Héalth and Safety Code provides as follows: "43644.> {a) No person shall install, sell, offer for sale, or adver— tise, or, except in an application to the State board for certification of a device, represent, any device as a motor vehicle pollution control device for use on any used motor vehicle unless that device has been certified by the State board. No person shall sell, offer for sale, advertise, or represent any motor vehicle pollution control device as a certified device which, in fact, is not a certified device. Any violation of this subdijvision is a misdemeanor." Any apparent violation of the conditions of this Executive Order will be submitted to the Attorney General of California for such action as he deems advisable. Executed at Sacramento, California, this @B__ day of July, 1976. owao.}\ $ LG\Y\QA \0 v\ Thomas"C. Austin Deputy Executive Officer—Technical

State of California AIR RESOURCES BOARD June 30, 1976 Staff Report Evaluation of Cragar Industries Inc.. "Hot Pipes" Tubing Exhaust Headers for Compliance with the Requirements of Section 27156 of the Motor Vehicle Code Introduction On December 10, 1975, the Air Resources received an application from Cragar Industries, Inc., Compton, California, requesting an exemption from the prohibitions of Vehicle Code Section 27156 for tubing exhaust headers. The applicant requests that this exemption be granted for 1975 and 1976 vehicles equipped with exhaust catalysts (See Appendix A). Supplemental test data was submitted by the manufacturer on three vehicles and confirmatory testihg was conducted on two vehicles. Exhaust header installations on 1974 and older model—year vehicles have been previously allowed under the ARB‘s replacement parts policy (considered equivalent to original equipment) with the provision that all emissfon controls be left intact. For newer vehicles equipped with exhaust catalysts, headers are considered to beba significant modification of the exhaust system and an emissions evaluation is required. This report does.not evaluate the conversion of single exhaust systems to dual exhaust systems on catalyst equipped vehicles.

II. Description Tubing exhaust headers are a—set of steel tubes designed to replace OEM cast iron exhaust manifolds. Individual tubes, one per engine cylinder, connect to each exhaust port on the cylinder head. These provide large radius bends as opposed to the short, right angle bends of the OEM manifold (See Figure 1). The individual tubes collect together upstream from the catalytic converters or from the exhaust cross—over, depending on the application (See Figure 2). Headers are designed for a particular engine to improve efficiency and decrease fuel consumption. The tube diameter, tube length, collector diameter and collector length are optimized to accomplish the exhaust tuning. The ranges for these dimensions are as follows: Tube Diameter 1 1/2 — 2 inches (40—50 mm) Tube Length 18 — 46 inches (45—115 cm) Collector Diameter 2 1/2 — 3 1/2 inches (65—90 mm) Collector Length 3 — 10 inches ‘ (8—25 cm) The exhaust header kits manufactured by the applicant are designed to replace the exhaust manifold without defeating the emissions control system. Each header kit is designed for a particular vehicle applica— tion and contains tuned headers and all necessary parts, fittings and flanges for "bolit—on" installation. The kit maintains the air injec— tion at original equipment locations by providing fittings into either the tubing headers or exhaust head pipe (this installation may require some minor bending of the air lines). The heat riser valve is maintained with an adapter kit provided in the header kit except

header tubes collector "//) Figure 1 — Tubing Exhaust Headers with Collectors .. exhaust f > . manifolds resonator muffler catalytic converter, V—8 engine catalytic converters exhaust resonator muffler ~~ 7 manifolds _/ \— V—8 engine {dual exhausts) Figure 2 — Typical OEM Exhéust Systems

on Chrysler and 1976 GM vehicles (On Chrysler vehicles, the heat. riser valve is integrally part of the OEM manifold. On 1976 GM vehicles, the vacuum control for the valve could not be easily modified). The heated air intake including the exhaust manifold stove is replaced with a unit supplied with the kit. A typical replacement unit is shown in Figure 3 (this unit uses a much smaller — heated surface than original equipment): The catalytic converter is not relocated and all thermal, overtemperature sensors are maintained. A tuned exhaust system generates 1qw pressure (rarefaction) pulses that propagate up the header tube toward the exhaust valve. During certain rpm ranges, these pulses arrive when the exhaust and intake valves are open (during valve overlap). These pulses then scavenge residual exhaust gases from the combustion chamber {residual gases reduce the size of the ‘incoming fuel—air charge as well as dilute this charge). "Scavenging" increases volumetric and thermal efficiencies. Headers may also reduce the exhaust system béck- pressure during certain operating modes and this, too, will increase the flow of residual exhaust gases from the combustion chamber. III. Claimed Benefits The applicant claims an improvement in highway fuel economy of 6—10% for the header kit installation. This claim is based on CVS testing and highway economy tests. The improvement .in fuel economy is attributed to reduced‘back-pressure at highway speeds.

AIR CLEANER INTAKE HEAT TUBE KHOSE CLAMP . HEADER. TUBE Figure 3 — Replacement Unit for . Heated Air Intake

IV. Potential Emission Effects Exhaust headers may increase HC and NOx emissions because of scavenging and reduced back—pressure. The residual exhaust gases in the combustion chamber are rich in HC and are normally burned in successive engine cycles. Scavenging and reducing back—pressure will incréése the flow of ‘these gases and HC into.the exhaust system (Depending on the amount of valve overlap, scavenging of the in« coming fuel—air charge can even occur under high load, high speed conditions). In addition, the residual gases dilute the incoming fuel—air mixture and reduce the peak combustion temperatures. Re— moving these gases will increase combystion temperatures and increase the formation of NOx. Reducing back—pressure may also affect the EGR system, both those with and without back—pressure modulation, and result in increased NOx. The exhaust header installation may also affect emissions through other mechanisms. First, the heat riser and heated air modifications may increase HC due to poor fuel vaporization under co]d-starf condi— tions. HC and CO emissions may also increase where excessive heat transfer through the header tubes lowers exhéust'temperatures and affects the exhaust catalyst operation. Other emission related problems could include heating of fuel lines and short—circuiting of spark plug wires. The operation of the exhaust catalyst could mask some HC and CO— effects of the headers. 16.

Evaluation The applicant conducted a test program‘with three catalyst—equipped vehicles, a 1975 Chevrolet (350—4¥), a 1975 Ford {351—2¥) and a 1975 Chrysler (318—2¥). CVS—75 emissions tests and EPA Highway Cycles were run on these vehicles at Olson Engingering, Huntington Beach, California. Each vehicle was tested in the stock configuration and with a header kit installation. Table I summarizes. these test results. The applicant‘s CVS—75 test data showed no emission increases with the header Kit installation. The CVS sample bags (3 per test) were also compared, baseline to headers, and showed no emission trends. The Highway Cycle tests showed that headers increased fuel economy on two vehicles {6—7%) and decreased fuel economy on one vehicle (2%). Modal data was collected during the applicant‘s CVS—75 tests to evaluate any transient effects. The analysis of this data showed ‘no trends toward increased emissfon during acceleration or cruise modes or during the first 113 seconds of the CVS—75. In addition, exhaust gas temperatures (catalyst inlet and outliet), exhaust gas pressure (catalyst inlet), and manifold vacuum were measured during selected modes. No conclusions could be drawn from these measurements except that headers caused no gross changes from baseline during the CVS—75 testing.

Table I — Cragar Test Results ’ Vehicle #1: 1975 Chevrolet Camaro (350—4V) single catalyst CVS—75: HC CO NOx Economy Baseline 0.9 4.3 2.2 14.6 Headers 0.6 3.5 2.2 14.7 Net Change —33% —19% 0% +1% EPA Highway Cycle: Baseline, 18.0 mpg ; Headers, 19.0 mpg (+6%) Vehicle #2: 1975 Ford Torino (351—2V) dual catalysts CVS—75: HC CO_ NOx Economy gm/mi gm/mi gm/m1i mpg Baseline 0.5 3.5 1.3 10.2 Headers 0.5 2.8 1.0 10.9 Net Change C% ~20% —23% +74% EPA Highway Cycle: Baseline, 15.2 mpg; Headers, 16.2 mp9 (+7%) Vehicle #3 1975 Chryslier Cordoba (318—2V) single catalyst CVS—75: HC CO NOx Economy gm/mi . gm/mi gm/mi _mpg Baseline . 0.5 5.5 1.4 10.3 Headers* 0.5 5.2 1.4 9.9 Net Change 0% —5% . 0% —4% EPA Highway Cycle: Baseline, 13.9 mpg; Headers*, 13.6 mpg (—2%) *without heat riser vaive

The ARB conducted a confirmatory test program on two vehicles (Reference ARB test report Project V—26, May 1976). The applicant supplied two catalyst—equipped vehicles for testing, a 1976 Chevrolet (350—4V¥) and a 1976 Ford (351—2V). One CVS—75, three hot—start CVS—72 and one loaded mode test were run on— each vehicle, with and without a header kit installation. A summary of the emission test data is given in Tables I1 and III. The CVS—75 tests generally showed ndlemission increases with headers and a small improvement in fuel economy of 8—9% {one vehicle did show a slight increase in NOx). The CVS—75 sample bags were comparedvbase1ine to headers and no emissiofis trends were noted. The CVS—72 and loaded mode tests supported the CVS—75 results. During the ARB testing, the carburetor inlet air and exhaust gas temperatures were recorded to determine any heat transfer effects of the header kit installation. .The carburetor inlet air was measured in the air cleaner. The exhaust gas temperatures were measured at the catalyst inlet on one vehicle and at the catalyst outlet bn both vehicles.. Figures 4, 5, 6 and 7. summarize the temperature measurements. The heated air intake modification With the header installation functioned approximately the same as the stock configuration on the 1976 Chevrolet »(the temperature recorder malfunctioned during the testing of the 1976 Ford). ‘After the preheat temperature was achieved (119°F) and the heated air intake vaive closed, the intake air temperature went to 85°F in the baseline tests while the intake air went to 128°F in the header

Table II — ARB Emission Test Results Test Vehicle: 1976 Chevrolet Silverado C—10 Pick—Up (350—4V), single catalyst (pellet—type) CVS—75 HC CO NOx. Economy gm/mi gm/mi gm/mi mpg Baseline 0.6 4.1 1.5 11.2 Headers* 0.7 3.9 1.8 12.2 Net Change +17% —5% +20% +9% Hot—Start CVS—72: Base1 ine** 0.4 . 1.6 1.7 11.4 Headers*+ 0.6 1.0 1.8 12.8 Net Change +50% —38% +6% +12% Loaded Mode: HC co NOx — ' ppm 4_ ppm High Cruise Baseline 11 0. 05 553 Headérs* 11 0.05 815 Low Cruise Baseline 11 0.05 150 Keaders* 11 0. 05 176 Idle Baseline 11 0. 05 25 Headers* 210C 0.05 25 *Without héat riser valve **Average of three tests +Average of two tests; engine was misfiring during one test possibly caused by overheating of the fuel line (1/2" from a header tube) or a spark plug misfire.

Table III — ARB Emission Test Results . Test Vehicle: 1976 Ford E—100 Van, (351—2V), single catalyst (monolithic) (No heat riser valve in stock configuration) CVS—75: HC CO NOx Economy gm/mi gm/mi gm/mi mpg Baseline 0.5 6.2 1.6 9.8 Headers 0.5 5.2 1.7 10.6 Net Change 0% ~16% +6% +8% Hot Start CVS—72: Base1ine* 0.3 2.9 1.8 10.6 Headers* o.3 To 2.7 1.8 10.9 Net Change 0% —7% Q% +3% *Average of three tests . Loaded Mode: No emissions comparison. The baseline test was run ' but a spark plug failed during the header test (cracked insulator). — Inlet Air Temperature (OF) _ 150 1 Replacement Heated Air Intake with Header Installation OEM 1976 Chevrolet 50 1 1 + ovi— a 1 5 $ — CVS—75 Time (Minutes) Figure 4 — Carburetor Inlet Air Temperature During CVS—75 11.

Figures 5, 6, 7—Exhaust Gas Temperaturgs During CVS—75 1000 + 1976 Ford OEM Catalyst Inlet 500 + HKeader Installation 0 t } } + 5 10 15 20 1000 | Header Installation 500 : Exhaust Gas Temperature (OF) 4 1976 Ford Catalyst Outlet 0 1 } 1 N 1 L . T 1 1 5 10 15 20 1976 Chevrolet 1000 | Catalyst Outlet OEM 500 | Header Installation 0 1 — 1 : ; 3 I 1 4/ T 0 5 10 15 > 20 ‘ CVS—75 Time {minutes) 12.

tests. This may have been the result of engine compartment heating by the headers (See discussion to follow). Figures 5, 6 and 7 show that the exhaust gas temperatures at the catalyst were reduced with the headers. The catalyst inlet temperatures on the 1976 Ford averaged 120°F lower with the headers. The catalyst outlet temperatures averaged 195°F lower on the Ford and 115°F lower on the Chevrolet (the§e averages are based on exhaust temperatures after the first 8—10 minutes of the CVS—75). There were no differences in catalyst "light—off" times between the header and OEM configurations. The lower inlet temperatures with headers apparently are the result of the header tubes with their extra surface area transfering heat ifnto the engine compartment (This may account for the rise in carburetor inlet air temperature during the header testing). As a result, the catalysts operated at reduced temperatures. This should improve catalyst durability but the higher engine compartment tehperatures could adversely affect the durability of other cém— ponents ({ignition wiring, vacuum hoses,. etc.}. The CVS—75 data from both the applicant‘s and the ARB‘s test programs were combined to give a larger data base and to determine if there was any correlation between various parameters and the changes in emissions or fuel economy. Table IV indicates that there may be some correlation between the amount of vaive overlap and the fuel economy benefits of headers. In addition, CO emissions were reduced 13.

Table IV — Changes in CVS—75 Emissions with Headers M . © - 1 Valve Overlap HC CO NOx Economy Test Vehicle N/V_ Deg. Deg.~In. L4 Te %4 %0 1975 Ford (315—2V) 38.1 47 0.618 0 ~20 _ ~23 <o +7% 1976 Ford (35'1--2V)2 38 41 0.49 0 —16 +6 +8% 1976 Chevrolet (350—4v)°°> 38.6 40 0. 355 +17 lous +20 +9% 1975 Chevrolet (350—4Vv) 34.1 40 0.355 —33 ~19 0 +1% 1975 Chryster (318—2v)° 37.3 0 26 f.a. o —5 0 ~4% "P1 1. Engine RPM/Vehfc]e MPH in high gear. » 27 Tested at the ARB laboratory. The remaining vehicles were tested at Olson Engineering. 3. Without heat riser valve during header testing. n.a. = not available

in all five back—to—back tests; a comparison of the CVS sample bags showed reduced CO with headers in 13 out of 15 bag comparisons. The tendency for increased fuel economy with headers on engines with large vaive overlap indicates improved efficiency due to reduced béck-pressure and/or scavenging. Valve overlap normally reduces efficiency except during high speed, high mass flow conditions. However, reducing back—pressure during normal operation acts to offset the dilution and volumetric effects of vaive overlap. Seavenging, if it is occurring, has a broadar operational {rpm) range with large valve overlap and, therefore, headers would have broader benefits on these engines. Reduced CO usually indicates leaning of the fuel—air mixture but the. header installation could possibly haye affected the catalyst operation. The fuel—air mixture might have been affected by the increase in underhood temperatures (if only in chassis dynamometer testing);~ however, the resulting increase in carburetor inlet temperature should cause enrichment; a possible explanation for lower CO fiight be a reductién fn fuel—air ratio variations from cylinder to cylinder caused by improved fuel vaporization. Lowering catalyst temperétures could increase CO oxidation if the catalyst temperatures are ex— cessively high ({the catalyst oxidation process is a surface reaction between the rare—metal catalyst and the exhaust gases. High surface temperatures act to repel the gases and inhibit the oxidation reaction). .Nonetheless, the mechaniém for a CO reduction with headers is not readily apparent. 15.

VI. Conclusion and Recommendat%ons This evaluation of tubing exhaust headers generally showed no emission increases on the vehicles and emission control systems tested; however, other emission control systems, namely back— pressure modulated EGR systems, could show adverse effects with headers. The heated air intake replacement appeared to operate satisfactorily and the deletion of the heat riser valve on certain vehicles did not appear to have any emission effects under CVS test conditions. The CVS tests also demonstrated a small increase in fuel economy. This increase appears to be related to engine design {valve overlap). The applicant‘s claim of a 6—10% improvement in highway fuel economy was supported by the ARB tests. The staff recommends that Cragar Industries be granted an exemption from the prohibitions of Vehicle Code Section 27156. This exemption should be for 1975 and 1976 model—year vehicles equipped with catalytic converters except those vehicles originally equippea with back—pressure moduTafed EGR systems. All emission control systems should be retained except the heat riser vaive on Chrysler Corporation vehicles and 1976 General Motors vehicles. The conversion of single exhaust systems to dual exhaust systems was not evaluated and should not be permitted. 16.

APPENDIX A INDUSTRIES INC. POST OFFICE Sox sers 19007 5. REYES AvENUE COMPTON, CALIF. $022.4 (213) 639—6211 December 9, 1975 Air Resources Board Laboratory 9528 Telstar Ave. El Monte, CA. 91731 Attention: Don Drachand, Chief Vehicle Compliance Dear Mr. Drachand: Regarding your recent letter, on behalf of CRAGAR Industries, Inc., I do here by request the board would give consideration to exemption status of the tubing exhaust headers manufactured by our company for the 75 & 76 catalytic equipped model years. Our tubing exhaust headers are designed to replace the cast iron exhaust manifolds on existing OE installations. The tub— ing exbhaust bheader represents replacement of the existing cast iron manifolds, and because of this extended length, there is a replacement of the head pipe that would lead from the cast iron manifold to the catalytic convertor or muffler depending on the situation. The objective of tubing exhaust headers is improvement in engine efficiency, namely mileage improvement. This is derived from the free flowing individual tubes that. comnnect to the cylinder head. The tubing exhaust header has smooth large radius bends as opposed to the short right angle bends of the stock cast iron configuration. ‘Because of the free flowing exhaust passage the cylinder scavanges more efficiently on the exhaust cycle and results in improved combustion from which we derive improvements in mileage and reduction in exhaust emissions. Regarding item 2B, II3 on instruction sheets, I have enclosed a group of the sheets that are currently issued with the existing headers. I envision a considerable change in the shests to accomodate the 75—76 vehicles. As it is now planned, these vehicles will have a complete kit with another part num— ber. It will include all necessary pieces to bolt dirgctly to the converter.© It is intended that all tubing diameters QUALITY IN DESIGN, MATERIALS AND WORKMANSHIP

EEEAAAAAAARRRRIRCRREEAARARERDAARESEEEAESAEiEieien APPENDIX A {cont‘d) December 9, 1975 Page 2 t will be matched and the flange will be supplied that will — bolt on to existing converters directly. — We feel that this bolt on feature requiring no cutting or welding will certainly reduce the instances of tampering. Thue Ford and General Motors kits will include the special flanged adaptation kit to readily accept the vacuum operated butterfly that is furnished with the OE system. As the case of our previous system, we will include all ne— cessary parts and accessories to accommodate the air pump fittings, etc,. The only problem area that has come up is some of the Chrysler products have the heat riser valve as an integral part of the cast iron manifold and it is not re— movable. The test data on the 75 Dodge supplied was without this valve installed. The Cold Start data looks good on this car and I don‘t see any problem in its elimination on these vehicles. As I recall, this has been an acceptable practice Zon the 74 & earlier vehicles. Our present plans do not in— clude any of the Chrysler products for the 75—76 model years. — Possibly it would better to discuss this item personally if. you find further information is necessary. Regarding paragraph 5, it is our intention at this time to request exemption for all domestic 75& 76 models. As you can see from our enclosed catalog, the list is really very small and we would expect to use similar listing for the T5 & 76 models. Our present plans are to include the Camaro, % ton Chevy Van and pick up, Chevette and Monza as our first units. Selected Ford models would be added later. Other than applying for exemption for each individual vehicle I don‘t know what other information you would require. As I mentioned to Dick Kenny before, we would be most pleased to offer a vehicle with tubing exhaust headers to you for test purposes. The Camaro we have retained in service since the installation and could be made available to you for a few days for evaluation. If you would choose to select an existing test vehicle for an installation, we would have to discuss something that could readily be fitted similar to our existing catalog listing. I doubt if it would prove gractical to have your personnel install headers at your facility, but I am sure we could work out an installation at our plant with your per— sonnel supervising, etc. We can discuss this item further if you desire. — I would like to discuss our thinking and general design cri— teria and the way we approach these vehicles for application. Obviously the individual model selection is based on estimated sales numbers. As it now stands, the $ ton Chevy —pick—up and van represents the larger volume sales for our headers and as

e APPENDIX A {cont‘d.) December 9, 1975 Page 3 I mentioned, we would certainly tool up these vehicles first. : Our objectives are to include all necessary hardward &nd in— structions so that the customer can bolt up all existing pollution control devices such as air injection fittings and heat risors. Detailed instructions and drawings would be supplied as well as clear language as to fines and penalties thab can result if these devices are left disconnected. It is also planned that all kits are to bolt to existing: muffler and exhaust systems, no attempt will be considered at this time to add any converters in an effort to add dual ex— bhaust to vehicles that presently have single exhaust. It was mentioned at one time that some thoughts existed as to plug wire problems etc. I showed an installation to Dick Kenny at one time and showed him that really this was not a problem. We are certainly aware of the problems that could arise from a shorted plug wire with the converter vehicles. _ The plug wires are frequently further from the exhaust tubing — than many OE systems. As I mentioned previously, the type that purchase performance equipment such as headers frequently up— ‘ grade the wires to better quality than OE, so I feel this plug wire problem does not exist. The headers in the area of the cylinder head is virtually identical to the 74 and earlier and certainly there has not been a rash of problems reported to us or the ARB. As far as existing over temp circuits, T am not aware of any vehicles whereby we affect these areas. The existing conver— ter location is maintained so the sensors are not disturbed. I hope this answers all of the questions the board has. If there are any areas of concern,possibly a meeting will best accomplish this purpose. I would again like to thank the board for their time and cooperation in this matter. Sincerely, CRAGAR INDUSIRIES, INC. Director — Research & Development AK/ks

APPENDIX 8 FOR THE TRADE HEADERS and R.V. DUAL EXHAUST KiTS

.PASSENGER CaArS HEADER KIT: Includes gaskets, swedges and all hardware necessary for bolt—on installation, including generator or alternator bracket. For Chevrolet Headers, excluding thase footnoted, that require smog fittings, place an 6afier the part number when ordering. See price list for additional charge. CRAGAR HEADERS ARE DESIGNED TO FIT: * Power steering and power brakes, except as footnoted * Air conditioning, except as footnoted * Chassis exit area, except as footnoted NOT DESIGNED TO FiT: *_ Column shift transmission finkage — Stick or Automatic without modification to linkage U Convertibles (larger frame and larger X member) HEADERS Cragar "Hot Pipes" Headers are pure scavenging headers developed by engineers and racers who demmand maximum performance from an exhaust system. Cragar headers are constructed to meet exacting factory specifications and all flanges are carefully fitted, heliarced and ground smooth for leakproof instaliation. A full one—year guarantee is included. DOMESTIE C ARS INCLUBED 1N HEADER KIT Header Tube: Tubs Coll. Coll for replacement parts only > > i Size: Lngh. Size: lngh. Reader Goll, Belt YEAR & MODEL > . Engine Part No. (inch) (inch) (inch) (inch) Gask, No. Gask. No. Ph. No. CHEVROLET §5—57 Chevrolet . 283—350 45000 1% 32 8 10 45001 45015 45005 58—64 Chevrolet 283—350 45040 1% 30 3 7 45001 45015 45005 G5—70 Chevrolet {17) (18) 283—350 45050(1) 13%4 80 3 10 45001 45015 45005 %4—74 Chevelle (17) (18) 283—350 45200 1% 31 3 10 45001 45015 45005 4—13 Chevelle (18) 396—454 45210 2 36 $¥k 10 45011 45016 45006 63—74 Corvette (17) (18) 283—350 45300 1% 32 3 10 45001 45015 45005 67—69 Camaro (17) (18) 283—350 45400 1% 32 3 10 45001 45015 45005 . 67—69 Camaro (18) 396—454 45410(1) 17 84 3% 10 45011 45016: — 45006 70—73 Camaro {17) (18) 802400 . 45420 1% 34 3 10 45001 45015 45005 74 Camaro (17) (18) $02—400 45440 —1% 32 3 10 45001 45015 45005 68—74 Chevy I! and Nove (13) 171 (18) 283—350 45400. 1% 82 3 10 45001 45015 45005 68—74 Chevy II and Nova (18} 396—454 45410(1) 1% 34 3¥2 10 45011 45016 45006 71—73 Vega (15) 140 45100 1% 31 242 _8 45101 47504 45009 DODGE 67—73 Dart, Swinger 273—340(19) 46000(1) 1 86 8 10 46001 45015 45007 67—74 Coronet, Charger, Chatlenger 818—340(19) 46010(1)1% 36 3 10 46001 45015 45007 66—74 (Wedge Engine) 883—400 46110(1) 1% 35 3 10 46111 45015 45005 71—72 Colt 1800ce 46020* 1¥2 40 2¥ 8 46021 47504 45009 FORD 64—73 Mustang (3) (8) Windsor 269—351 46600 1% 35 3 10 48601 45015 45006 67—70 Mustang (3) 390—428 46610 1% 41 $¥a 10 46611 45016 45008 71 Mustang (13) 429 46620° 2 36 3¥a. 10 46561 45016 45006 70 Mustang (4) ' Cleveland (4V) 351 . 46670 1%s. 36 8¥a 10 46631 45016 45012 63—71 Falcon, Fairlane (4) (13) . Windsor 289—302 46650 1¥2 34 2%a _8 46601 45019 45006 70—71 Falcon, Fairlane, — Cleveland (4V) 351 46670 17. 36 3va 10 46631 " 45016 45012 Torino (3) . — 71—73 Maverick (3) Windsor _ 302 46720 1% 34 3 10 46601 45015 45006. . 72—74 Falcon, Fairlane, Cleveland (2V) 351—400 46590 1% 36 3 10 46581 45015 45012 Torino (2) ' * .;73 Pinto 2000cc 46710 1¥ 40 2/ 8 46711 47504 45009 * to be discontinued when present stock is depieted FOOTNOTES ON PAGE 6 5

PASSENGER CARS c—» fncluoro In #EADER KIT Reader Yate Tubs Coll. Call: for replacement parts un} Kit Size Lngh, Size Ingh, Header Coll. olt YEAR & MODEL Engine Part No. finch) {inch) (inch} (inch) Gask, No. Gask, No. Pi. No. MERCURY 64—72 Cougar (3) (8) Windsor 289—351 46600 1% 35 3 10 46601 45015 45006 67—70 Cougar (3) 390—428 46610 1% 41 >3% 10 46611 45016 45008 71 Cougar (13) 429 46620° 2 36 3¥ 10 46561 45016 45006 70 Cougar (4) Cleveland (4V) 351 46670 1% 36 S¥2 10 46631 45016 45012 63—70 Comet and Gyclone (4) (13) Windsor 2809—302 46650 1% 34 2% 008 46601 45019 45008 70—71 Comet and Cycione (3) Cleveland (4V) 351 46670 1% 36 8e 10 46631 45016 45012 71—73 Comet (3) Windsor 302 46720 1% 34 3 10 46601 45015 45006 72—74 Montego (2) Cleveland (2V) 851—400 46590 1% 86 3 10 46581 45015 45012 71—73 Gapri 2000cc 46710 1¥ 40 2% 8 46711 47504 45009 OLDSMOBILE 65—72 Ofdsmobile 400—455 45700 1% 32 3 10 45701 45015 45005 PLYMOUTH — * 67—69 Barracuda 273—340(19) 486000(1)1% 36 $ 10 46001 45015 45007 :jg:‘ 70—73 Duster 273—840(19) 486000(1) 14 36 3 10 46001 45015 45007 67—74 Belvedere, Roadrunner 318—340(19) 46010(1)1% 36 3 10 46001 45015 45007 70—74 Barracuda 818—340(19) 48010(1) 1% 36 3 10 46001 45015 45007 66—74—(Wedge Engine} 383—400 4§110(1) 1% 85 3 10 46111 45015 45006 PONTIAC ~ 64—72 GTO (14) 389—400 45800 1% 32 3 10 45801 45015 45005 67—69 Firebird 889—400 45850 1% 82 3 10 45801 45015 45005 70—73 Firebird 400 45800 1% 34 8 10 45801 45015 450085 72—73, Ventura 11 (10) 850 45850 1% 32 3 10 45801 45015 45005 FOREIGN CARS ~> motsbes in weaber sar Header Tube Tube Coll. Call. for replacement parts onl Kit Stze Lngh, Size Ligh, Header call. oft YEAR & MOBEL Engine Part No. Ginch) finch) (inch) (inch) Gask. No. Gask. No. Pi. Ro. OPEL 69—72 GT 1900cc 49000° 1% 26 2% 8 49001 47504 45009 PORSCHE 56—65 356 (12) (16—RR) 49200‘ 1% 36 2700 4 49201 47504 45009 66—69 912 (16—LR) 1600cc 49210° 1% 36 2¥ 4 49201 47504 . 45008 66—72.911 (16—LR) 6 oyl. 49220* 2 18 2 3 49221 (6) (6) TOYOTA . . 71—73 Corona and Celica 1900cc 49300° 1# >24 2¥ 4 49301 47504 45009 VOLKSWAGEN 61—72 Passenger, Ghia with muffier E40, 40 HP 1300—1500ce 47500 14 30 2¥ 4 47505 47504 47503 63—67 Bus with muffier . Dune Buggy Extractor 1300—1600 47530‘ 1% 46 2 3 47505 47504 45009 with Muffler (16) Dune Buggy (Racing, Single Seater} 47540——Order 25, sets—Minimum Quantity 6,.:} * to be discontinued when present stock is depleted FOOTNOTES ON PAGE 6

CAMPERS — PICHKUPS — VANS — TRUCKS — JEEPS RV DUAL EXHAUST KIT The easiest solution to economy and horsepower is better engine effacrency through breathing. "Coof Duals" from Cragar, not only offer increased fuel economy, but improve ~ performance for most pick—ups, vans and trucks. This RV Dual—Exhaust Kit is designed to be used with OEM type mufflers (mufflers not included in Kit) and is easily mounted to factory installed exhaust manifolds or Cragar‘s Headers. le Cragar "Cool Duals" Kit, installed with OEM type mufflers will meet the noise emissions levels of most states. f% * Cragar will not assume responsibility of fit, if "Cool Duals" are used with headers other than Cragars All "Cool Duals" feature 2%4" headpipes and 2" tail pipes. * For vehicles equipped with auxiliary fuel tanks, other than factory installed original equ1pment "Cool Duals" may have to be modified, in which case, Cragar will not be responsible for fit. For vans that have been converted to camping use and have been equipped with holding tanks, propane bottles or auxiliary fuel tanks mounted on the under carriage, "Cool Duals" may have to be mcd(fred for instaliation. Cragar will not assume responsibility for fit after modifications. — Suggested OEM type mufflers for "Cool Duals": IPC—2470, Gidon'-3007,.Goerfiqh-Msez, Walker—21206 HEADERS Cragar "Hot Pipes" Headers are pure scavenging headers developed by engineers and racers who demand m=vimum performance from an exhaust system. Cragar headers are constructed to meet exacting factory . ifications and all flanges are carefully fitted, heliarced and ground smooth for leakproof installation. A one—year guarantee is included. * mouupes in meAber kiT YEAR & MOBEL Engine oiik Kit No. Part Nv finch) (inch) .{inch) (inch) Gask, No.~> Gask. Hu. Pi. No. CHEVROLET [ — & 64—73 Chevelle, E1 Camino (18) 896—454 N.A. 45210 2 36 8# 10 45011 45016 450086‘ 64—74 Cheveile, El Camino (17) (18) 283—850 |N.A. 45200 1% 31 3 10 45001 45015 45005 85—59 Pickup (10) (17) (18) 288—850 |N.A. 45500(1) 1% 80 s 10 45001 450150 45005 63—68 Pickup (17) (18) 283—350 |NA. 45530(1) 1% 30 B 10 45001 45015 450905 65—67 Pickup (25) 896—454 N.A. 45510 1% 32 3 10 45511 45015 — 45006 68—74 C10, C20 (18) 896—454 44510(21)(23)45510 1% 82 8 10 45511 45015 45006. 69—72 C10, C20 (17)(18) . 283—350 44530(21) 45530(11) 1% 30 3 7 45001 45015 45005 > 73—74 C10, C2o (17) (18) 307—350 44560((5:1;; 45530(11) 1% 30 3 7‘ 45001 45018 46005 , 69—72 G10, ©20 (Four Wheel Drive}(17) (18) 350 44550(21)]| 45530(11) 1% 30 3 7 45001 45015 45005 73—74 C10, C20 (Four Wheel Drive}(17) (18) 307—350 |44540(21)) 45530(11) 1%. 30 3 7 45001 45015 45005 69—72 Blazer (Four Wheel Drive)(17) (18) 263—350 44550 45530(11) 1% 30 3 7 45001 45015 45005 73—74 Blazer (Four Wheel Drive} (17) (18) 307—350 |44540(21)) 45530(11) 1%: 30 3 7 45001 45015 45005 71—74 All Vans (18) 307—350 44520(21 45520 1%° 32 3 10 45001 45015 45005 DATSUN J . 70—71 Pickup with smog device 1600cc }N.A. 49120* 1% 30 2% 06 49111 47504 45009 DODGE 68—74 Pickup D100, D200 383—400—440 |N.A. 46130(1)(2) 1% 34 3 10 46111 45015 45005 _ 70—74 Van 318—340 44850 46050(1) 1% 34 3 10 45001 45015 45007 ‘ "4 Van . 360 44850 46050((12)2) 1% 34 3 10 48001 ; 45015 45007 74 Ramcharger (Four Wheel Drive) 318—360 44870 46060(1) 1% 32 3 7 46001 45015 45007 72—74 Pickup W100, W200 318—860 44880 46060(1) 1% 32 3 7 46001 45018 45007 (Four Wheel Drive} w/o aux. fuel tank * to be discontinued when present stock is depleted FOOTNOTES ON PAGE 5

STREET ROADSTER — SPRINT CAR INCLUDEO IN HesoER KIT Header Tuhe Tubs call. Coll. for replacement parts only Kit Size Ingh. Size Lngh. Header tall, Bolt MAKE Engine Part No. (inch) > (inch) (inch) (inch) Gask, No. Gask, No. PE. No, Chevrolet and Sprint Car Kit (16) 283—400 45610(5) 1% 32 3 18 45001 45015 45005 BOAT . Ford* s90—428 48200 2 g2 —0s% c 24 46611 (6) (6) Ford* Cleveland (4V) 302—351 48220 2 36 3¥2 24 46631 (6) (6) Chrysier® 426 48300 2 36 342 24 46121 (6) (6) DRAGSTER INCLUDED IN KEABER 1GT Tube Tube Calf. Goll. for repiscement parts only Header Beader Size Ingh. Size Lngh, Header Call, Bolt _ ENGINE Part No. Part No. (inch) (inch) {inch) (inch) Gask. No, Gask, No. Pk, No. 428 Hemi (24) 28" Car 48526—200 30" Car 48530—200 2 B C — (6) — (6) > 48526—225 48530—225 2M 22 ho — (6) — (6) 48526—250 48530—250 242 22 ~— ~(8) — (6) 392 Hemi (24) 26" Car 48626—200 30" Car 48630—200 2 22 — —— (6) — (6) 48626—225 48630—225 2¥ 22 — — (6) — (6) 48626—250 48630—250 2¥2 22 — (6) — (6) 427 Chevy (24) 26" Car 48726—200 30" Car 48750—200 2 22 & sc (® — (6) 48726—225 48730925 2% 22000 —0 — (6) — (6) * to be discontinued when inventory exhausted. FOOTNOTES (14) Brake lines distribution block must be moved 68—72. {1) Smog fitting not available on this model. (15) Will not fit power brakes without altering parts, (2) Will not fit manual transmission without altering parts. (16) Right rear exit area. . (3) Power steering bracket #46612 — two pleces. (17) Bracket is necessary to mount A/C pump. Please see (4) Power steering bracket #46613 — one piece. components part listing page 7. (5) Kit — all parts supplied. (18) Parts are necessary to re—connect hot air tube to air cleaner— — Please see components parts list page 7. (6) Not supplied. 19) This head i q & (7) Will not fit 1967 models with factory air. (19) sys!?er:.a er will also fit 360 cu, in. engine without air pump (8) &figéggc‘%gérsa&d Mustang 289—302/68—73 Cougar and (20) Will not fit with factory swaybar. }. Cragar headers dated before 12/74 will not fit with Sagi— (gg) “:VVI:: fit l?_af springs 9"1)" naw and Bendix (with bubble side) power steering. ((23; p 'r ’éc" it 'g"’ge‘s W!‘t“ fmogt‘\j:TASM dait h or Crew Cal ation (10) Will not fit automatic transmission without altering parts. > extensions are é%%,ll%dlo ° additional head pipe (11) Will not fit with winch power take off. (24) For réar engine type with a wing over rear wheels, write "W" (12) Will not it power steering without altering parts. in front of the part number when ordering. > (18) Will not fit air conditioning without altering parts. (25) Will fit automatic only. REPLACEMENT PARTS — FOR RY DVUAL EXHAUST KCITS RV Dual Exhaust Kit . Left Right Mounting Part Left Right Head Pipe Head Pipe teft Right Rardware Head Pipe Head Pige Nember Head Pipe Head Pipe Extension Extension Tall Pipe Tall Pige Kit Gaskets Flange 44510 44511 44512 44513 44518 44515 44516 44627 44501 N.A. 44520 44521 44522 44513 44513 44515 44516 44527 44502 44503 ©44580 44531 44582 44533 44534 44515 44516 44527 44502 44503 44540 44541 44542 44543 44544 44515 44516 44517 44502 44503 44550 44551 44552 44543 44544 44515 44516 44517 44502 44508 44560 44541 44542 44563 44563 44515 44516 44527 44502 44503 44710 44721 44722 44718 44724 44715 44516 44727 44711 N.A. 44720 44721 44722 44723 44724 44515 44516 44627 44711 . N.A. » 44730 44731 44732 44738 44734 44515 44516 44627 44711 N.A. 44740 44741 44742 44743 44744 44515 44516 44627 44711 N.A 44750 44741 44742 44773 44744 44715 44518 44727 44711. N.A. 44760 44751 44782 44753 44754 44755 44756 44627 44502 44706 installed on Head Pipe 44770 44731 44732 44763 44734 44715 44518 44727 44711 NA. f‘fi% . 44760 44781 44782 44783 44783 44515 44516 44627 * 44501 N.A. 'g*wz,r."“ 44790 44781 44782 44793 44783 44715 44516 44727 44501 N.A. 44850 44831 44832 44833 44833 44515 44516 44627 N.A. 44504 44870 44841 44842 44848 44843 44515 44516 44627 N.A 44504 44880 44841 44842 44853 44054 44515 44516 44627 N.A. 44504

CAMPERS — PICKUPS . VANS — TRUCKS — JEEPS INCLUDED 1M HEADER KIT RY Sual Header Tube Tube Call. Call, for replacement parts only Exhaust Kit Size Lngh. Size ingh. Header Coll. Bolt YeaR & MODEL Engine Kit Mo. Part No. (inch) (inch) (inch) (inch) Gask. No. Gask. No. Pk. No. FORD 63—71 Ranchero Windsor 289—302| N.A. 46650(4) 1¥ 34 242 8 46601 45019 45006 70—71 Ranchero Cleveland (4V) 351 N.A. 46670(4) 17 36 3¥ 10 46631 45016 45012 72—74 Ranchero Cleveland (2V) 351—400| N.A. 46590(2) 1% 36 3 10 46581 45015 45012 68—74 Van Windsor 802 44760 46760 1% 30 3 . 10 46601 45015 45006 66—73 Bronceo 289—302 N.A. 46790 1¥ 36 242 8 45601 45018 45006 66—74 Pickup F100, F250 352—390 44720 46750(7) (@) 1% 30 3 7 46611 45015 45006 (w/o aux, fuel tank) . > — ' 65—74 Pickup F100, F250 $52—390 44710 46750(7) (2) 1%> .30 3 T 46611 ._ 45015 45008 (with aux. fuel tank) . 65—74 Pickup F100 w/o aux. fuel tank 360—390 44730 46600 1% 50 3 7 46611 45015 45006 (Four Wheel Drive) > 65—74 Pickup F100 with aux. fuel tank 360—390 44770 46800 1% 30 8 7 46611 45015 45006 (Four Wheet Drive) — 69—74 F250 w/o aux. fuel tank 852—360 44740 46770 1% 30 3 7 46611 45015 45006 {Four Wheel Drive) 69—74 F250 with aux,. fuel tank 352—360 44750 46770 1% 30 3 7 45611 45015 45006 (Four Wheel Drive) > 74 F100, F250 w/o aux, fuel tank _ 460 44780 46810(20) 134 80 3 7 46561 45015 45006 74 F100, F250 with aux, fuel tank 460 44790 46810(20) 1% 30 3 7 46561 45015 45006 GMC ' 70—74 Sprint (17) (18) 350 N.A. 45200 1% 31 8 10 45001 45015 45005 70—73 Sprint (18) 396—454 N.A. 45210 2 36 3%2 10 45011 45016 45006 67—68 Pickup — Jimmy 263—350 NA. 45530(11) 1% 30 3 7 45001 45015 45005 > Including 4WD (17) (18) — . Y2T, %7, Suburban, 17 Trucks . . 69—72 C10, C20 (17) (18) 283—350| 44530(21) 45530(11) 1% 30 8 7 45001 45015 . 45005 73—74 C10, C20 (17) (18) 307—350 44560((3;)) 45530(11) 1% 30 3 7 45001 45015 45005 69—72 C10, C©20.{Four Wheel Drive)(17)—({18) 350 44550(21) 45530(11) 1% 30 8 7 45001 45015 45005 73—74 C18, ©20 (Four Wheel Drive){17) (18) 307—350) 44540(21)| . 45§30(11) 1% .30 3 7 45001 45015 45005 5 68—74 Pickup{18) 396—454 44510((2:13)) 45510 1% 32 8 10 . 45611 45015. ;45006 71—74— Van (18) 307—350| 44520 45520 1% 32 3 10 _ 45004 45015 45005 JEEP CJ5 &6 Jeep 304 45910(1) 1% 32 8 10 47001° 45015 45006 PLYMCOUTH 74 Trail Duster (Four Wheel Drive) 318—360)| 44870 48060(1) 1% 32 3 7 46001 45015 45007 74 Van 318—340 44850 46050 (1) 1% 34 3 10 46001 . 45015 45007 74 Van 360 44850 46050(1)(22) 1% 34 3 10 46001 °45015 45007 REPLACEMENT PARTS FOR RV DUAL EXHAUST KiTS ON PAGE 6 6 * to be discontinued when present stock is depleted FOOTNOTES ON PAGE 6 n

HEADER ACCESSORIES AND COMPONENT PaARTS HEADER KIT incluoes caskETS, SWEDaGES AND ALL HaARDWARE NECESSARY FoR BOLT—ON INSTALLATION, inclub. ING GENERATOR AND ALTERNATOR BRACKET. DOES NOT INCLUDE AiR CONDITIONING BRACKETS oR POWER sTEERriNc BRACKET, MUST ORDER SEPARATELY. APPROXIMATE SHIPPING . . WEIGHT Passenger Cars, Datsun 240—Z, Boats V8 and 6 cylinder ' 35 lbs. Chevrolet Street roadster, Trucks, Van and Dragsters 35 lbs. Without Smog Fittings — Mini Cars, Foreign Cars (except VW & Porschs) . 25 lbs. Mini Trucks, Foreign Trucks 25 Ibs. All with Smog Fittings —— Mini Cars, Foreign Cars (except VW & Porsche) 25 lbs. Mini Trucks, Foreign Trucks w — 25 Ibs. Porsche . . 26 lbs. Volkswagen Dune Buggy (extractor system) ‘ 16 Ibs. APPROXIMATE COoMPONENTS sHiPPiNG PART NO. WEIGHT CHEVROLET SMOG FITTINGS Included excluding those footnoted (1) S in Header Kit Put an ‘S‘ after Header Kit Part number when ordering. HOT AIR HOOK—UP—Small Block Chevy Flex hose and necessary clamps and fittings to connect up heater air 45523 12 oz. to air cleaner for emission controls. HOT AIR HOOK—UP—Big Block Chevy 45525 120z Flex hose and necessary clamps and fittings to connect up heater air to air cleaner for emission controls. POWER STEERING BRACKET Power Steering Bracket to Lower Both Ends of Cylinder. (2 Brackets & 1 Bolt & Nut.) 46612 4 lbs. Power Steering Bracket to. Lower Frame End of Cylinder. (One Bracket.) 46613 2 lbs. . HEADER GASKETS—See Header Gasket Part No, Column for Correct Part No. 3¥ oz. TAPERED REDUCERS—Triangle flange 2%" Flange to 2" O.D.—Pair 45018 . 1 tb. 3" Flange to 2%4" O.D.—Pair 45014 142 lbs. 8%" Flange to 2%2" O.D.—Pair 45013 2 Ibs. COLLECTOR GASKETS—Triangle flange 2%" 1.D.—Pair . 47504 1 oz. 2%" 1.D.—Pair 45019 1 oz 3" 1.D.—Pair 45015 10z 3%2" 1.D.—Pair 45016 1 oz. BOLT PACKS 12 Header Bolts %~16x%" and 6 Collector Bolts and Nuts %—16x1" > 45005 12 oz. 16 Header Bolts %—16x%" and 6 Collector Bolts and Nuts %—16x1" 45006 15 oz: 12 Header Bolts 5/16—16x%" and 6 Collector Bolts and Nuts %—16x1" 45007 12 0z. 28 Header Bolts %—16x%" and 6 Collector Bolts and Nuts %—16xt" 45008 28 oz. 6 Collector Bolts and Nuts %—16x1" 450098 6 oz. 16 Header Bolts %—16x1" and 6 Collector Bolts and Nuts %¥—16x1" 45012 15 oz. ACCESSORY, MOUNTING BRACKET . Air Conditioning Bracket for Right or Left Side of Small Block—Type Chevy Engine, (Bracket & 2 Bolts) 45422 12 0z. Alternator or Generator Bracket for Right (Passenger) Side of Small Block—Type Chevy Engine. (Bracket & 2 Bolts) 45302} 12 oz. Alternator or Generator Bracket for Left (Driver) Side of Small Block—Type Chevy Engine. (Bracket & 2 Bolts) 45402} 12 oz. t This Part Number supplied with Headers as necessary.

Cragar Products are used and recommended by many of the record holding racers of the following associations: CRAGAR INDUSTRIES INC. 19007 South Reyes Avenue, Compton, California 90221 (213) 639—6211 Form 15003—1 * copyright © 1974 CragarIndustries, Inc. Printed in U.S.A.

APPENULA C INDUSTRIES INC. ramk ® post orEice sox sere 19007 5. REYES AVENUE COMPTON, CALIF, 90224 .CRAGAR HEADERS # 45560 s.c. 1975—76 Chevy Pickup (213) esg—6211 with Catalytic Converter A WORD ABOUT CRAGAR HEADERS You will find Cragar Headers to be of the best enginsered ‘exhaust units on the market. Their efficient "free flow" design and simplified bolt— on installation results from the latest information available to engi— neers and racers who demand maximum performance from an exhaust system. IMPORTANT NOTE: Because of the limited amount of room in most of the engine compartments of today‘s automobiles, a few space problems may bécome evident, forcing header units very close to engine and chasis components. This is quite normal on most applications. PREPARATION: Your car must be raised at least 24 inches for installing the headers. Cragar recommends the use of a h01st or similar type lift— ing device. DO NOT USE BUMPER JACKS. NOTE: On 4 x 4 trucks ~— the spring shakle bolts at the rear of front springs must be installed with head of bolt to inside of spring. INSTALLATION: . ‘Left Side 1. Disconnect battery cable to avolild damage to the truck‘s electrical system. 2. Unbolt stock head pipe, cross over pipe and disconnect at muffler and remove from truck. 3. Remove oil filter, clutch linkage, dip stick tube, spark plugs, stock exhaust manifold. (On earlier models remove alteérnator or generator). — ow + Starting from below, work header through chassis and into position. Place gasket in position and start bolts (most restricted first). Tighten all bolts (most restricted first). Replace oil filter, clutch linkage, dip stick tube and spark plugs. Right Slde . Remove stock exhaust manifold, spark plugs and—starter. NP .& Starting from below, work header through chassis and into position. Start front bolt only. , Replace starter. Ew Remove front bolt, place gasket 1n+o position and start all bolts. (Most restricted first). Tighten all bolts. (Most restricted" first). ~OU 108008 Replace spark plugs. Attach the left side head pipe section to the converter using the existing clamps. Connect the other end to the header using the bolts and gasket provided. Install the right side pipe to the left side pipe using the clamps C supplied and bolt to header with gasket and bolts provided. QUALITY IN DESIGN, MATERIALS AND WORKMANSHIP

APPENDIX C {Cont‘d.) CRAGAR HEADERS #45560 S.C. 1975—76 Chevy Pickup with Catalytic Converter 9. Using the tubing supplied, make the air injector pump con— nection, if vehicle is so equipped, using the hose clamps supplied. The existing tubing must be cut off in the straight section running parallel to the oil pan. Connect battery cable, start the engifie and check for leaks. After several hours of running time, retighten all header bolts. Air conditioning mounting bracket is necessary, #45422 for right and left side. Illustration to help. reconnect power steering pump bracket. If alternator bolts to end of exhaust manifold use Chevy Part No. 3825461 bracket and 3825451 spacer which will bolt to bracket ° provided with your headers. If you have a comment regarding Cragar Headers or their installation, let us know! .


Document Created: 2005-09-01 12:43:06
Document Modified: 2005-09-01 12:43:06

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