Approval Details

Valid E.O.


This Executive Order approved the specified parts on on June 7, 1999.
As of Wednesday, October 16th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
WIK-L35-4.3L1996-99 GM 4.3L trucks, 1.16L supercharger w/ 2.6" diameter pulleysame as above

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-231-14
  • Executive Order 231-14 / D231-14
  • ARB # D-231-14
  • Executive Order No: D-231-14
  • C.A.R.B. No. D-231-14
  • Resolution D-231-14
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-231-14 PDF

D-231-14 Document:

                                                                                      (Page 1 of 2)

                                                 State of California
                                             AIR RESOURCES BOARD

                                        EXECUTIVE ORDER D—231—14
                                  Relating to Exemptions Under Section 27156
                                                of the Vehicle Code

                                         WHIPPLE INDUSTRIES, INC.
                                          8 PSI. WHIPPLECHARGER

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 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 WhippleCharger, manufactured and marketed
by Whipple Industries, Inc., 3292 N. Weber Ave. Fresno, California, 93722 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 the following General Motors truck applications:

Year            Engine             Kit #s3             Pulley Diameter            Compressor Size

1996—99         4.3L           WIK—L35—4.3L                2.60"                        1.16L
1999            4.8L           WIK—LR4—4.8L                3.33"                        2.1L
1996—99         5.0L           WIK—L30—5.0L                3.64"                        2.1L
1999            5.3L           WIK—LM7—5.3L                3.23"                        2.1L
1996—99         5.TL           WIK—L31—5.7L                3.23"                        2.1L
1999            6.0L           WIK—LQ4—6.0L                2.81"                        2.1L
1996—99         7AL            WIK—L29—7 .4L               2.60"                        2.1L

The WhippleCharger kit includes the following main components: Twin Screw Whipple supercharger, two
auxiliary fuel injectors with a stand alone computer, air bypass vailve, add—on 6.25" diameter crankshaft pulley,
and the use of the stock closed element air cleaner.

This Executive Order is valid provided that the installation instructions for the supercharger will not recommend
tuning the vehicle to specifications different from those of the vehicle manufacturer. Whipple recommends that
only 92 octane fuel be used.

Changes made to the design or operating conditions of the supercharger, as exempt by the Air Resources Board,
which adversely affect the performance of the vehicle‘s pollution control system shall invalidate this Executive

This Executive Order shall not apply to any Whipple Industries supercharger kit advertised, offered for sale, or
sold with or installed on, a motor vehicle prior to or concurrent with transfer to an ultimate purchaser.

Marketing of the supercharger using any identification other than that shown in this Executive Order or
marketing of the supercharger 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 supercharger shall
not be construed as exemption to sell, offer for sale, or advertise any component of the kit as an individual device.

       Whipple Industries, Inc.                                                      Executive Order D—231—14
      , Supercharger                                                                 (Page 2 of 2)

       This Executive Order does not constitute any opinion as to the effect the use of the supercharger may have on any
       warranty either expressed or implied by the vehicle manufacturer.

       This Executive Order is granted based on the following emissions test data submitted by the kit manufacturer:

       1999 5.3L C1500 truck, certified to a Low Emission Vehicle (LEV) emission standard
                              NMOG       CO      NOX       HCHO
       Standards              0.160      4.4     0.4       0.018
       devicew/dfs       _    0105 13            04 _      0.002)
       Test results showed that the supercharger kit when installed on the vehicle did not cause tailpipe emissions to
       exceed the vehicle‘s applicable emission standard during a Cold Start CVS—75 Federal Test Procedure. This
       Executive Order is also based on On Board Diagnostic II (OBD II) testing conducted on the same test vehicle.
       Test data showed that the supercharger kit when installed on the vehicle did not affect the vehicle‘s ability to
       perform its OBD II monitoring.

       This Executive Order is granted based on submitted emissions test data which shows that emissions are not
       affected during the Cold—Start CVS 75 Federal Test Procedure. However, the ARB finds that reasonable grounds
       exist to believe that use of the Whipple supercharger may adversely affect emissions of motor vehicles when
        operating under conditions outside the parameters of the previously prescribed test procedures. Accordingly, the
        ARB reserves the right to conduct additional emission tests, in the future, as such tests are developed, that will
        more adequately measure emissions from all cycle phases. If such test results demonstrate that the supercharger
        adversely affects emissions during off—cycle conditions (defined as those conditions which are beyond the
        parameters of the Cold—Start CVS—75. Federal Test Procedure), this Executive Order shall be effectively
        rescinded as of the date the test results are validated. Further, if such test results or other evidence provides the

        ARB with reason to suspect that the supercharger will affect the durability of the emission control systems,
        Whipple shall be required to submit durability data to show that the durability of the vehicle emission control
        system is not, in fact, affected and/or that the add—on or modified part demonstrates adequate durability.

        In addition to the foregoing, the ARB 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.


        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 of the 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 hearing that
        grounds for revocation exist.

        Executive Order D—231—13, dated March, 1999, is superseded and of no further force and effect.
        Executed at El Monte, California, this 2 + day of June 1999.

                                                 Mobxle Source Operanons Division

Document Created: 2005-09-01 12:45:37
Document Modified: 2005-09-01 12:45:37

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