Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on October 26, 1999.
As of Tuesday, December 11th, 2018 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsRemarks
TFS-304100011986 and older GM vehicles with a 262-400 c.i.d. V8 engineAluminum construction, 2.02" diameter intake valve, 1.6" diameter exhaust valve, chamber volume 63 cc

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-369-4
  • Executive Order 369-4 / D369-4
  • ARB # D-369-4
  • Executive Order No: D-369-4
  • C.A.R.B. No. D-369-4
  • Resolution D-369-4
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-369-4 PDF

D-369-4 Document:



                                                                                       (Page 1 of 2)




                                                     State of California
                                                AIR RESOURCES BOARD


                                               EXECUTIVE ORDER D—369—4
                                         Relating to Exemptions Under Section 27156
                                                      of the Vehicle Code


                                              TRICK FLOW SPECIALTIES
                                          TWISTED WEDGE CYLINDER HEADS


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

    Pursuant to the authority vested in the undersigned by Section 39515 and Section 39516 of the Health and
    Safety Code and Executive Order G—45—9;

    IT IS ORDERED AND RESOLVED: That the installation of the Twisted Wedge Cylinder Heads,
    manufactured and marketed by Trick Flow Specialties, 1248 Southeast Avenue, Tallmadge, Ohio 44278 has
    been found not to reduce the effectiveness ofthe applicable vehicle pollution control system and, therefore, is
   exempt from the prohibitions of Section 27156 of the Vehicle Code for installation on the following 1995 and
.older General Motors vehicles powered with a 262—400 c.i.d. V8 small block engine:

                        Application                                Part Number

                        1986 and older                             TFS—30410001
                        1987—95 Non LT—1                           TFS—30410002
                        1986—91 Corvette Non LT—1                  TFS—30410003
                        1992—95 LT—1 Engines                       TFS—30410004
                        1986 and older                             TFS—30410005
                        1987—95 w/Perimeter Cover                  TFS—30410006

    Trick Flow Specialties‘ Twisted Wedge Cylinder Heads are manufactured out of aluminum and are equipped
    with a 2.02" diameterintake vaive, 1.6" diameter exhaust valve, and a chamber volume of 63 cc.

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

    Changes made to the design or operating conditions of the cylinder heads, as exempted by the Air Resources
    Board, which adversely affect the performance of the vehicle‘s polfution control system shall invalidate this
    Executive Order.

    Marketing of the cylinder heads using any identification other than that shown in this Executive Order or
    marketing of the cylinder heads for an application other than those listed in this Executive Order shall be
    prohibited unless prior approval is obtained from the Air Resources Board. Exemption of the cylinder heads
    shall not be construed as exemption to sell, offer for sale, or advertise any component of the kit as an individual
    device.                                                                              '


  TRICK FLOW SPECIALTIES                                                       Executive Order D—369—4
  Cylinder Heads                                                               (Page 2 of 2)




   This Executive Order is granted based on submitted emissions test data on a 1995 Chevrolet €1500 truck with
   a 5.7L engine. Test results showed that tailpipe emissions with the Twisted Wedge Cylinder Heads installed
   on the vehicle met the vehicle‘s applicable emission standard during a Cold Start CVS—75 Federal Test
   Procedure.

   This Executive Order does not constitute any opinion as to the effect the use of the cylinder heads 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 TRICK FLOW SPECIALTIES® TWISTED WEDGE CYLINDER HEADS.

   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 a ten—day written notice of intention to revoke the order, in which period the holder ofthe
   order may request in writing a hearing to contest the proposed revocation. If a hearing is requested, it shall be
   held within ten days of receipt of the request and the order may not be revoked until a determination after
‘earing that grounds for revocation exist.

   Executive Order D—369—2, dated April 1998, is superseded and of no further force and effect.

   Executed at El Monte, California, this   _2%% day of October 1999.




                                    R. B. Summerfield, Chief
                                    Mobile Source Operations Division



Document Created: 2005-09-01 12:43:53
Document Modified: 2005-09-01 12:43:53

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