Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on June 2, 1992.
As of Wednesday, December 12th, 2018 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModels
886001986-1992 Ford Mustangs equipped with 5.0L engine, 1987-1992 Ford Pick-up trucks equipped with 7.5L engine

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-167-5
  • Executive Order 167-5 / D167-5
  • ARB # D-167-5
  • Executive Order No: D-167-5
  • C.A.R.B. No. D-167-5
  • Resolution D-167-5
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-167-5 PDF

D-167-5 Document:



                                                     (Page 1 of 2)

                            State of California
                            AIR RESOURCES BOARD

                          EXECUTIVE ORDER D—167—5
                 Relating to Exemptions Under Section 27156
                            of the Yehicle Code

                            HEDMAN MANUFACTURING
                      TUBULAR EXHAUST MANIFOLD SYSTEM


Pursuant to the authority vested in the Air Resources by Section 27156 of
the Vehicle Code; and

Pursuant to the authority vested in the undérsigned by Section 39515 and
39516 of the Health and Safety Code and Executive Order &—45—5;

IT IS ORDERED AND RESOLYVED: That the installation of the Tubular Exhaust
Manifold System {16 gauge), part nos. 88600, 88600—6, 894§61 and 89461—6,
manufactured by Hedman Manufacturing of 9599 Jefferson Bivd., Culver City,
California 90232, has been found not to 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 198§6—92 model—year
Ford Mustangs equipped with a 5.0 liter engine and 1987—92 Ford pick—up
trucks equipped with a 7.5 liter.

This Executive Order is valid provided that installation instructions for
this device will not recommend tuning the vehicle to specifications          :
different from those submitted by the device manufacturer.

Changes made to the design or operating conditions of the device, as         %
exempted by the Air Resources Board, that adversely affect the performance|
of a vehicle‘s poliution 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 prohitited unless prior
approval is obtained from the Air Resources Board.     Exemption of a kit shall
not be construed as an exemption to sell, offer for sale, or advertise any
component of the product as an individual device.

This Executive Order does not constitute any opinion as to the effect that
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 RESOURCES BOARD OF ANY
CLAIMS OF THE APPLICANT CONCERNING ANTI—POLLUTION BENEFITS OR ANY ALLEGED
BENEFITS OF THE HEDMAN MANUFACTURING TUBULAR EXHAUST MANIFOLD SYSTEM.

No claim of any kind, such as "Approved by the Air Resources Board" may be
made with respect to the action taken herein in any advertising or other
oral or written communications.


HEDMAN MANUFACTURING                                 EXECUTIVE ORDER D—167—5
TUBULAR EXHAUST MANIFOLD SYSTEM                      (Page 2 of 2)


Section 17500 of the Business and Professions Code makes untrue or
misleading advertising unlawful, and Section 17534 makes violation
punishable as a misdemeanor.

Section 43644 of the Health and Safety Code provides as follows:

     "43644,   ({a)   No person shall install, sell offer for sale, or
    advertise 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 subdivision 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.

Executive Order D—167—1 is superceded and of no further force and effect.

Executed at E1 Monte, California, this d_’“fi%y of June, 1992.



                                        R.B/ Summerfield
                                        Assistant Division Chief
                                        Mobile Source Division
                                                         1




                                                                               c s
                                                                               hememerenaes.: matoommmmimecntsnrsmercos o
                                                                                     “


                       State of California
                       AIR RESOURCES BOARD




EVALUATION OF HEDMAN MANUFACTURING‘S TUBULAR EXHAUST MANIFOLD SYSTEM
        FOR EXEMPTION FROM THE PROHIBITIONS OF VEHICLE CODE
  SECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13, OF THE
                   CALIFORNIA CODE OF REGULATIONS




                            June 1992


                           State of California
                           AIR RESOURCES BOARD




    EVALUATION OF HEDMAN MANUFACTURING‘S TUBULAR EXHAUST MANIFOLD SYSTEM
            FOR EXEMPTION FROM THE PROHIBITIONS OF VEHICLE CODE
      SECTION 27156 IN ACCORDANCE WITH SECTION 2222, TITLE 13, OF THE
                       CALIFORNIA CODE OF REGULATIONS




                                     by
                          Mobile Source Division
                            State of California
                            Air Resources Board
                            9528 Telstar Avenue
                          E1 Monte, CA 91731—2990




{This report has been reviewed by the staff of the California Air Resources
Board and approved for publication. Approval does not signify that the
contents necessarily reflect the views and policies of the Air Resources
Board, nor does the mention of trade names or commercial products constitute
endorsement or recommendation for use.)
                                                                               o+ mmemmsemn


                                  SUMMARY
     Hedman Manufacturing {Hedman) of 9599 Jefferson Bivd., Culver City,

California 90232, has requested to update Executive Order D—167—1 which

exempts Hedman‘s Tubular Exhaust Manifold System (TEMS) from the

prohibitions of California Vehicle Code Section 27156.    The existing

Executive Order D—167—1 exempts Hedman‘s TEMS for installation on 1987—91

Ford pick—up trucks equipped with a 7.5 liter electronic fuel injected

engine.   The update is requested to include 1992 model—year Ford pick—up

trucks with either a 7.5 liter electronic fuél injected engine.    Hedman also

requested that 1986—92 Ford Mustangs equipped with a 5.0 liter fuel—injected

engine be included in the vehicle application.

     Based on an engineering evaluation along with emission test results

performed by Hedman at an independent laboratory, and that the 1992 vehicles

for which the exemption update is requested are carry—overs from the model—

years for which an exemption has been granted, the staff concludes that

Hedman‘s TEMS will not adversely affect exhaust emission from the vehicles

for which an exemption is requested.

     The staff recommends that Hedman be granted Executive Order D—167—5

allowing the installation of their TEMS, part nos. 88600, 88600—6, 89461 and

89461—6, on 1986—92 Ford Mustangs equipped with a 5.0 liter engine and 1987—

92 Ford pick—up trucks equipped with a 7.5 liter engine


                                                        Page No.


SUMMARY

CONTENTS                                                     11

I.         INTRODUCTION

II.        CONCLUSION

III.       RECOMMENDATION




                                                              n
IV.        TUBULAR EXHAUST MANIFOLD SYSTEM DESCRIPTIOGN




                                                              no
           DISCUSSION




                                                              &
VI.        APPENDIX

           APPENDIX A:      INSTALLATION INSTRUCTIONS       A—1


 EVALUATION OF HEDMAN MANUFACTURING‘$ TUBULAR EXHAUST MANTFOLD sYsTEM For
EXEMPTION FROM THE PROHIBITIONS OF VEHICLE CODE SECTION 27156 IN ACCORDANCE
     WITH SECTION 2222, TITLE 13, OF THE CALIFORNIA CODE OF REGULATIONS


I.    INIRODUCTION
      Hedman Manufacturing (Hedman) of 9599 Jefferson Blvd., Culver City,

California 90232, has requested to update Executive Order D—167—1 which

exempts Hedman‘s Tubular Exhaust Manifold System (TEMS) from the

prohibitions of California Vehicle Code Section 27156.   The existing

Executive Order D—167—1 exempts Hedman‘s TEMS for installation on 1987—91

Ford pick—up trucks with a 7.5 liter electronic fuel injected engine.     The

update is requested to include 1992 model—year Ford pick—up trucks with

either a 7.5 liter electronic fuel injected engine.   Hedman also requested

that 1986—92 Ford Mustangs equipped with a 5.0 liter fuel injected engine

be included in the exemption.

      Hedman claims no changes to the installation instructions or tune—up

specifications are necessary for use of the TEMS on the 1992 updates.



II.   CONCLUSION
      Based on an engingering evaluation along with emission test results

performed by Hedman at an independent laboratory, and that the 1992 vehicles

for which the exemption update is requested are carry—overs from the model—

years for which an exemption has been granted, the staff concludes that

Hedman‘s TEMS, part nos. 88600, 88600—6, 89461 and §9461—6, will not

adversely affect exhaust emission from the vehicles for which an exemption

is requested.


III. RECOMMENDATION
      The staff recommends that Hedman be granted Executive Order D—167—5

allowing the installation of their TEMS, part nos. 88600, 88600—6, 89461 and

89461—6, on 1986—92 Ford Mustangs equipped with 5.0 lTiter engines and 1987—

92 Ford pick—up trucks equipped with 7.5 liter engines.



IV.   IUBULAREXHAUSTMANTEOLDSYSTEMDESCRIPTION
      The Hedman TEMS, part nos. $8600 and 88600—6, are specifically designed

for installation on 1986—92 Ford Mustangs equipped with a 5.0 liter engine

and TEMS, part nos. 89461 and 89461—6, are specifically designed for

installation on 1987—92 Ford pick—up trucks equipped with a 7.5 liter

engine.   The TEMS consists of exhaust manifolds and pre—catalyst piping.    As

with the original equipment manufacturer‘s (OEM) exhaust system, the

function of Hedman‘s TEMS is to route exhaust gases from the two exhaust

manifolds of the engine into a common pipe which then feeds to the catalytic

converter.   The TEMS, part nos. 88600 and $8600—6, for the 1986—92 Ford

Mustangs, have four primary tubes of 1—5/8 inch outside diameter which

combine into a 3 inch outside diameter collector pipe.     The collector pipe

 length is 2—7/8 inches.   The TEMS, part nos. 89461 and 89461—6, for the

1987—92 Ford pick—up trucks have four 1—3/4 inch outside diameter primary

tubes which feed into a 3 inch collector pipe.    The length of the collector

pipe is §—1/2 inches which then feeds into the "Y" pipe.    All tubes are

comprised of #16 gauge steel.

      The TEMS is functionally identical to the cast iron exhaust manifolds

and tubular steel collector pipes of the OEM exhaust system.     The difference


is the design dimensions of the TEMS which optimizes the flow

characteristics of the exhaust gases.    The manufacturer claims TEMS was

designed to improve the flow of exhaust gases from the cylinder heads to the

catalytic converter, thereby promoting improved volumetric and combustion

efficiency.

      The system operates in conjunction with the OEM computer controlled

electronic fuel injection and emission control systems already certified

with the stock engines.   Appendix A contains a sample of the installation

instructions.



Vy.   DISCUSSION
      Hedman has requested an update to their Executive Orders D—167—1 to

allow the use of the TEMS on the applicable 1992 model—year trucks.     Their

Tubular Exhaust Manifold Systems are identical to those previously approved

for the 1987—91 trucks.   The staff compared the engine design of the 1991

and 1992 model—year trucks.     Since the 1992 model—year trucks certified for

California sales were carried—over from the 1991 model—year, no additional

exhaust emission tests were required or performed.

      Hedman also requested the exemption to cover installation of TEMS on

1986—92 Ford Mustangs equipped with a 5.0 liter engine.     Previous test data

has shown that for header applications, the "worst" case vehicle is the

vehicle with the largest engine displacement and gross vehicle weight.

Hedman previously tested on a 1991 Ford F—250 pick—up truck equipped with a

7.5 liter engine.   The 1991 Ford F—250 pick—up truck‘s emission increase due

to the use of the TEMS (see Table 1) is within the allowable increase of 10
percent or.0.1 g/mi HC, 15 percent or 1.0 g/mi CO, and 10 percent or 0.1

g/mi NOx above the baseline as specified under the "Procedures for Exemption

of Add—On or Modified Parts."


         —   /




/                                      Table 1

                           CVS—7§ Tests Conducted by Hedman

             Engine Size           Vehicle Tested     (KHC    co    NOx) g/m
               (liter)

Device           7.5               91 Ford F—250       .972   9.872 7.060
Baseline                           Full Size Truck     .888 10.120 6.568
Difference                                            +.084   —.248 +.492
% Difference                                          +9.5%   —2.5% +7.5%
     Based on the fact that the 1986—92 Ford Mustangs have a smaller engine

size and a lower gross vehicle weight than the 1991 Ford F—250 pick—up

truck, the exhaust emissions increase would be less than those of the 1991

Ford F—250 pick—up truck.       Therefore, staff concludes that based on previous

testing conducted by Hedman, no emission impact would be observed on 1986—92

Ford Mustangs equipped with 5.0 liter engines when the TEMS is installed.

     The staff recommends that Hedman be granted Executive Order D—167—5

allowing the installation of their TEMS, part nos. $8600, 88600—6, 89461 and

89461—6, on 1986—92 Ford Mustangs equipped with a 5.0 liter enigne and 1987—

92 Ford pick—up trucks equipped with 7.5'liter engines.


APPENDIX


                                                            APPENDIX A




                                      >         PART #88600
                                      MUSTANG GT/LX SR 302W                     a6—91


                                                 C A U T         I   O No   !


      THIS IS A CUSTOM QESIGNEO EXHAUST HEDOER SYSTEM DESEGNEO FOR THIS PARTICULAR
      APPLICATION(S}.  0O NOT EENO, CUT, OENT, ORILL OR HEAT ANY PORTION OF THIS
    +~HEDDER! ANY ALTERATION OTHER THAN THOSE SUGGESTEO IN THIS INSTRUCTION SHEET
      WILL VOIO THE HEDMAN LIFETINME WARRANTY!
         TO PAEVENT LEAKS,        INSTALL YOUR HEOOERS WITH HEOMAN FLANGE GASKETS onLY:!

         BEFORE STARYTING INSTALLATION:
         It is necessary to raise the            vehicle         at   least 36          inches from the ground.            A
         floor hoist is recommended.  If none available, use a hydraulic jack with
         jack stands.  D0 NOT USE A BUMPER JACK!

         INSTALLATION      INSTRUCTIONS:

         1.   Disconnect battery, remove stock exhaust manifolds, headpipes, etc.
              Spark plugs should also be removed to eliminate possible damage
              during installation.

         Z'Hemove oil dipstick tube.
         =
         3    Install passenger side first.                     With gasket in place,             install hedder
              from above and start all            bolts.          Oo not tighten.
     &                                  L
         4.   iBe sure that there is        adequate clesrance of all hoses,                        lines,   etc.
               Tighten hedder bolts.

         5.   Install drivers side.           With gasket in place,                     install   hedder from above
              and start all bolts.
         6.   Tighten sll     bolts    evenly.


         7.   Re—install oil dipstick tube and spark plugs.  On some madels, it will
              be necessary to use a regular wrench to tighten spark plugs.  Replace
              stock exhaust manifold bolts with 3/8" X 2%" bolts and nuts supplied
              in parts kit to hook          up   your stock exhaust                system.

         8.   Make sure all wires,          cables,       and hoses have proper clearance.

         9.    Re—Connect battery.
     10.      Start engine and allow to run long enough to gain normal operating
              temperature.   Turn engine off and re—tighten all hedder bolts
                     HARENEING:    REKOVAL OF CATALYTIC CONVERTERS AMND OTHER FACTORY AIR
                                  POLLUTION CONTROL DEVICES IS I[LLEGAL.   WE RECOMMEND ¥0U
                                  ABIDE BY THE LAW. OUR TESTING INDICATES PERFORMANCE IS
                                  NOT SIGNIFICANTLY AFFECTED BY THESE DEVICES.

                 *   oiz
                                   ENJOY YOUR HEDOERAS WHILE COMBINING —                                £owo®
                           INCHEASED FUEL ECONOMY WITH BETTER PEAFORMANCE:!



\   9599 Jefferson Boulevard Culver City, California S0232 P173 ASa—7501
                                                                                                      couppertgnes t ceen mto c
                                            «tpneemstmme w 5+



Document Created: 2005-09-01 12:42:11
Document Modified: 2005-09-01 12:42:11

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