Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on November 15, 2007.
As of Sunday, August 18th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsRemarks
THY-5112000 to 2004 Tacoma, 4Runner 2/4wd with 2.4 or 2.7L engineThe Summit Industries, Inc.ÔÇÖs Thorley Headers are a shorty style header that is manufactured out of 14 gage mild steel with either a chrome or ceramic finish. The oxygen sensor is retained in the stock location and at a collector. The headers may include a connecting Y-pipe that is also manufactured out of 14 gage mild steel.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-540-4
  • Executive Order 540-4 / D540-4
  • ARB # D-540-4
  • Executive Order No: D-540-4
  • C.A.R.B. No. D-540-4
  • Resolution D-540-4
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-540-4 PDF

D-540-4 Document:



                                    State of California
                                AIR RESOURCES BOARD

                              EXECU1-IVE ORDER D-540-4

                       Relating to Exemptions Under Section 27156
                                    of the Vehicle Code

                                  Summit 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 installation of the Thorley Headers,
manufactured by Summit Industries, Inc. of 1200 West 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 271 56 of the Vehicle Code for the following vehicle applications:

Part No.      Application                                              Engine Displacement

              2000 to 2004 Tacoma, 4Runner 214wd                     2.4L         & 2.7L
              2005 to 2008 Tacoma, 4Runner 214wd                                  2.7L
              1995 to 2004 Tacoma, 4Runner, T100, Tundra, 214wd                   3.4L
              1995 to 2004 Tacoma, 4Runner, T I 00, Tundra, 214wd wIEGR           3.4L
              2005 to 2008 Tacoma, 4Runner, FJ Cruiser 214wd                      4.0L
              2000 to 2004 Tundra 214wd                                           4.7L
              2005 to 2006 Tundra 214wd                                           4.7L
              2007 to 2008 Tundra 214wd                                           4.7L
              2007 to 2008 Tundra 214wd                                            5.7L

The Summit Industries, Inc.'s Thorley Headers are a shorty style header that is
manufactured out of 14 gage mild steel with either a chrome or ceramic finish. The
oxygen sensor is retained in the stock location and at a collector. The headers may
include a connecting Y-pipe that is also manufactured out of 14 gage mild steel.

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 ~~ltimate purchaser.


Changes made to the design or operating conditions of the device, as exerr~ptby 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 opir~iolias to the effect the use of the device
may have on any warranty either expressed or implied by the vehicle manufacturer.

This Executive Order is granted based on submitted emission test data generated on a
2007 model year Toyota Tundra, engine test grol-lp 7TYXT05.7BEVI certified to the Low
Emission Vehicle II Ultra Low Emission Vehicle (LEV II ULEV) emission standards. Test
results on the Tundra showed that emission levels, with Summit Industries, Inc.'s Thorley
Headers installed, met the applicable emission standards when tested using the Cold-Start
CVS-75 Federal Test Procedure (FTP) and the Supplemental Federal Test Procedure
(SFTP US06) test cycles. Examination of the OBD II system showed the Thorley Headers
did not affect OBD II system operation. Results from emission testing conducted at
Automotive Testing and Development Services, Inc., 400 South Etiwanda Avenue, Ontario,
California 91761, are shown below, in grams per mile, with deterioration factors (df)
applied.
                                    CVS-75 FTP
                                 NMOG       CO      NOx          HCHO
Standards                        0.040      1.7     0.05         0.008
Device Test                      0.040      0.4     0.02         0.000



Standards 4k
Device

The Air Resources Board reserves the right in the future to review this Executive Order and
the exemption provided herein to assure that the exempted add-on or modified part
continues to meet the standards and procedures of Title 13, California Code of
Regulations, Section 2222, et seq.

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
AN-I-I-POLLU-TION BENEFITS OR ANY ALLEGED BENEFITS OF SUNlNllT
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 co~itestthe
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    4day of November 2007.
                                         /5


                            V@ette    Hebert, Chief
                              Mobile Source Operations Division




              SUMMIT INDUSTRIES, INC. - THORLEY HEADERS - D-540-4



Document Created: 2007-11-19 16:15:24
Document Modified: 2007-11-19 16:15:24

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