Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on August 15, 2008.
As of Thursday, January 2nd, 2025 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
See PDF1999 and older vehicles, See PDFThe Summit Industries, Inc.ÔÇÖs Thorley Headers are of a long tube style design. Installation may require the use of a connecting Y pipe. Both the exhaust header and Y pipe are manufactured out of 14 gage mild steel. On vehicles that are equipped with an oxygen sensor, the sensor is located either on the headerÔÇÖs collector or at the top of the Y pipe similar to the vehicles stock configuration.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-540-5
  • Executive Order 540-5 / D540-5
  • ARB # D-540-5
  • Executive Order No: D-540-5
  • C.A.R.B. No. D-540-5
  • Resolution D-540-5
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-540-5 PDF

D-540-5 Document:

CARB_D-540-5

State of California AIR RESOURCES BOARD EXECUTIVE ORDER D—540—5 Relating to Exemptions Under Section 27156 of the Vehicle Code Surnmit Industries, Inc. Thorley 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 Sections 39515 and 39516 of the Health and Safety Code and Executive Order G—02—003; IT IS ORDERED AND RESOLVED: That the instaliation of Thorley Headers manufactured by Summit Industries, Inc. of 1220 Railroad Street, Corona, California 92882, has been found not to reduce the effectiveness of the applicable vehicle pollution control system and, therefore, is exempt from the prohibitions of Section 27156 of the Vehicle Code for those applicable vehicles as listed in Exthibit A of this Executive Order, excluding any vehicle certified to the Ultra Low Emission Vehicle (ULEV) standards or equipped with a close coupled catalyst. The Summit Industries,Inc.‘s Thorley Headers are of a long tube style design. Installation may require the use of a connecting Y pipe. Both the exhaust header and Y pipe are manufactured out of 14 gage mild steel. On vehicles that are equipped with an oxygen sensor, the sensor is located either on the header‘s collector or at the top of the Y pipe similar to the vehicles stock configuration. This Executive Order is valid provided that installation instructions for this device will not recommend tuning the vehicles to specifications different from those of the vehicle manufacturer. _ This Executive Order shall not apply to any Summit Industries, Inc.‘s Thorley Header advertised, offered for sale, sold with, or installed on a new motor vehicle prior to or concurrent with transfer to an ultimate purchaser. Changes made to the design or operating conditions of the device, as exempt by the Air Resources Board, which adversely affect the performance of a vehicle‘s pollution control system shall invalidate this Executive Order. Marketing of this device using any 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 Order does not constitute any opinion as to the effect the use of the 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 CLAIMS OF THE APPLICANT CONCERNING ANTI—POLLUTION BENEFITS OR ANY ALLEGED BENEFITS OF SUMMIT INDUSTRIES, INC.‘S THORLEY HEADERS. 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 communication. Violation of any of the above conditions shall be grounds for revocation of this order. The order may be‘revoked only after ten days written notice of intention to revoke the order, in which period the holder of the order may request in writing a hearing to contest the proposed revocation. If a hearing is requested, it will be held within ten days of receipt of the request and the order may not be revoked until a determination is made after the hearing that grounds for revocation exist. Executed at El Monte, California, this /5%gy of August 2008. ‘(* Lm—wLx"~ nette Hebert, Chief ~ Mobile Source Operations Division SUMMIT INDUSTRIES, INC. — THORLEY HEADERS — D—540—5

Exhibit A Chrysler Corporation Vehicles Years Applications Engines Part# 1975—87 Vans/ "C" Motorhomes 273—360 106¥ 1975—87 Vans/Motorhomes 273—360 107¥ 1975—91 Vans/Motorhomes 361—440 109Y 1975—93 Trucks 273—360 114Y 1975—93 Trucks 273—360 115Y 1982—95 "A" Motorhomes 273—360 147Y 1979—89 D50/ Arrow Pick—ups 2.0L 4 eyl. 131 1979—82 D5Q0/ Arrow Pick—ups 2.0 & 2.6L 4cyl. 133Y 1975—91 Trucks 361—440 134Y 1975—79 Dart; All Pass Cars 273—360 153 1994—99 Dodge Ram Pick—up 2wd 488 V—10 160¥ 1996—99 Dodge Ram Pick—up 2wd 488 V-IQ Cal 161Y 1994—95 Dodge Ram Pick—up 2wd 318—360 162Y 1996—99 Dodge Ram Pick—up 2wd 318—360 163Y 1994—95 Dodge Ram Pick—up 4wd 318—360 164Y 1996—99 Dodge Ram Pick—up 4wd 318—360 165¥ 1995 Dodge "A" Motorhome 488 V—10 170Y¢ 1989—91 Dakota Pick—up 273—360 189Y 1992—94 Dakota Pick—up 273—360 190¥ 1992—94 Dakota Pick—up 273—360 191Y 1994 Dakota Pick—up 273—360 192Y 1995 Dakota Pick—up 273—360 193Y 1995 Dakota Pick—up 273—360 194Y

Exhibit A cont. Chrysler Corporation Vehicles (Cont.) Years Applications Engines Part# 1998—99 Durango 2wd | 318—360 196Y 1998—99 Durango 4wd 318—360 197¥ 1996—99 Pick—up 2wd 318—360 196¥ 1996—99 Pick—up 2wd 318—360 197¥ 1981—86 Jeep CJ 4.0L &4.2L 6 cyl. 604Y 1975—86 Jeep CJ Series 304—401 605¥ 1981—86 Jeep CJ 304—401 606¥ 1975—82 Jeep CJ Series 232—258 610 1981—93 Jeep J Series 304—401 615Y 1975—79 Jeep Cherokee/Wagoneer 304—401 615Y 1981—93 Jeep J Series 304—401 616¥ 1981—93 Jeep J Series 304—401 617Y 1980—82 Jeep Cherokee/Wagoneer 304—401 625Y 1993—95 Jeep Grand Cherokee 273—360 630Y 1987—92 Jeep Grand Cherokee 4.2L 6 cyl. 632Y 1987—90 Jeep Cherokee 4.0L 6 cyl. 633Y 1991—99 Jeep:YJ,TJ,XJ,ZJ 4.0L 6 cyl. 634Y 1987—95 Jeep Wrangler 4.0L 6 cyl. 636Y 1996—99 Jeep Grand Cherokee 318—360 631Y

Exhibit A cont. Ford Motor Company Vehicles Years Applications Engines Part# 1987—94 Motorhomes 379—460 209Y La 1975—79 Trucks 379—460 210 1975—87 Trucks/Vans/ "C" Motorhomes 379—460 211Y or 216Y 1987 —97 Vans/ Motorhomes 379—460 212Y 1985—89 Gillig Motorhomes 379—460 213 1986—98 Trucks/Vans/Motorhomes 379—460 214Y 1981—82 Trucks 351M—400M 215 1981—82 Trucks/Vans 351M—400M 225 1977—79 Trucks —351M—400 230 1979—83 Courier Pick—ups 1.8L 4cyl. 245Y 1980—85 Trucks/Vans/Bronco 302—351 W 248Y 1986—95 Trucks/Vans/Bronco 302W 249 1982—85 Ranger/Bronco II 2wd 2.3L 4cyl. 250Y¥ 1986—98 Trucks F250/F350 351W 251 1983—85 Ranger/Bronco II 4wd 2.8L 6cyl. 255 1990—95 Explorer/Bronco IU/Ranger 4.0L 6cyl. 257 1975—77 Bronco 255—302W 263 1975—76 Trucks 352—428 264 1975—78 Cougar; Pass Cars 351/400 265 1980—95 Mustang/Capri 255—302 285 1994—95 Mustang/Capri 255—302 286 1975—78 Mustang/Capri 255—302 287 1979—85 Mustang/Capri 255—302 288 1996—98 Mustang/Capri 255—302 290

Exhibit A cont. General Motors Vehicles Years Applications Engines Part# 1975—88 Trucks 262—400 300Y 1996—99 Trucks 350 Vortec 301Y 1996—99 Trucks 350 Vortec 302Y 1991—95 Motorhomes 366—454 303Y 1987—91 Trucks 366—454 303¥ 1987—91 Trucks 366—454 304Y 1987—95 Motorhomes w/Allison trans. 366—454 305Y 1987—99 Motorhomes 366—454 306Y 1996—99 Trucks 350 Vortec 307Y 1975—79 Camaro/ Pass Cars 262—400 308 1999—2000 Trucks/Tahoe/Yukon/Suburban 4.8L & 5.3L 310¥ 1975—95 Vans/ "C" Motorhomes 262—400 315Y 1981—95 Vans/ "C" Motorhomes 262—400 316Y 1928—95 Cars/Trucks 262—400 317Y 1996—98 Trucks/Motorhomes 262—400 318Y 1975—77 Cutlass 350—403 332 1975—79 Firebird 350—455 332 1976—85 Trucks 1.8L 335 1975—79 Firebird (Pont. Engine) 350—455 341 1975—81 Corvette 262—400 350 1982—87 Trucks 2.8L 6 cyl. 345 1985—95 Astro/Safari Vans 4.3L 6 cyl. 346 1988—95 Trucks/Vans 4.3L 6 cyl 347 1988—95 Trucks 4.3L 6 cyl. 348 1987—90 Reveon Motorhomes 366—454 354Y

Exhibit A cont. General Motors Vehicles (Cont.) Years Applications Engines Part# 1987—98 $10/815 4.3L 6 cyl. 361 1987—98 T—10/T—15 Vehicles 4.3L 6 cyl. 362 1975—91 Trucks 262—400 364Y 1983—89 Trucks 2.8L 6 cyl. 365 1975—91 Trucks 262—400 367Y 1975—81 Camaro/Pass Cars 262—400 373Y 1982—92 Camaro/Pass Cars 262—400 374Y 1980—87 Camaro/Pass Cars 262—400 375Y 1980—95 Passenger Cars 262—400 378Y 1993—95 Camaro/Pass Cars 262—400 379Y 1982—1990 Camaro/Pass Cars 262—400 380Y¥ 1988—92 Camaro/Pass Cars 262—400 381Y 1988—95 Trucks/Suburban/Blazer/Yukon 262—400 383Y 1988—95 Trucks/Suburban/Blazer/Yfikon 262—400 384Y 1988—95 Trucks/Suburban/Blazer/Yukon 262—400 385Y 1988—95 Trucks/Suburban/Blazer/Yukon 262—400 386Y 1988—95 Trucks/Suburban/Blazer 366—454 388Y 1988—94 454 "SS" Trucks 366—454 392Y 1996—98 Motorhomes 366—454 395Y 1996—98 Trucks 366—454 396Y

Exhibit A cont. General Motors Vehicles (Cont.) 1996—98 Trucks 366—454 397Y 1987—91 Trucks 366—454 398Y 1987—91 Trucks 366—454 399Y Geo Vehicles Years Applications Engines Part# 1983—95 GEO Tracker 1.3 to 1.6L 4 cyl. 700Y Isuzu Vehicles Years Applications Engines Part# 1984—87 Trooper 2.3L 4 cyl. 8s0O0Y Mitsubishi Vehicles Years Applications Engines Part# 1982—89 Pick—ups 2.0L 4 cyl. 131Y 1979—89 Pick—ups/Montero 2.6L 4 cyl. 133Y

Exhibit A cont. Nissan Vehicles Years _ Applications Engines Part# 1978—80 Pick—ups 2.0L 4 cyl. 405Y 1981—88 Pick—ups NAP—Z 4 cyl. 450Y 1986—88 Pick—ups NAP—Z 4 cyl. 456Y 1986—95 Pick—ups/Pathfinders 3.0L 6 cyl. 462 1986—95 Pick—ups/Pathfinders 3.0L 6 cyl. 464 1989—95 Pick—ups/Pathfinders NAP—Z 4 cyl. 490¥ Suzuki Vehicles Years Applications Engines Part# 1983—95 Samurai/Sidekick 1.3 to 1.6L 4 cyl. 700¥ Toyota Vehicles Years Applications Engines Part# 1976—85 Celica 20R/22R 502Y 1982—85 Supra 20R/22R 5S30Y¥ 1981—87 Pick—ups/4—Runner 20R/22R 542Y 1984—88 Pick—ups/4—Runner 20R/22R 5S5OY¥ 1988—95 Pick—ups/4—Runner 20R/22R 555¥


Document Created: 2008-08-25 13:43:44
Document Modified: 2008-08-25 13:43:44

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