Approval Details

Valid E.O.


This Executive Order approved the specified parts on on February 1, 2000.
As of Sunday, August 25th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
WIK-L35-4.3L1996-2000 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-231-16
  • Executive Order 231-16 / D231-16
  • ARB # D-231-16
  • Executive Order No: D-231-16
  • C.A.R.B. No. D-231-16
  • Resolution D-231-16
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-231-16 PDF

D-231-16 Document:

                                                                                     (Page 1 of 2)

                                                        State of California
                                                    AIR RESOURCES BOARD

                                                   EXECUTIVE ORDER D—231—16
                                        Relating to Exemptions Under Section 27156
                                                       of the Vehicle Code

                                                   WHIPPLE INDUSTRIES, INC.
                                                    8 PSI. WHIPPLECHARGER

           Pu(rjsuant to the authority vested in the Air Resources Board by Section 27156 of the Vehicle Code;
           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 listed below, excluding any vehicle certified to an ultra low emission vehicle
           (ULEV) emission standard.

           Year         Engine           Kit #5s              Pulley Diameter    Compressor Size

           1996—2000    4.3L.       WIK—L35—4.3L              2.60"                  1. 16L
           1999—2000    4.8L        WIK—LR4—4.8L              3.33"                  21L
           1996—2000    5.0L        WIK—L30—5.0L              3.64"                  21L
           1999—2000     5.3L       WIK—LM7—5.3L              3.23"                  21L
           1996—2000    5.7L.       WIK—L31—5.7L              3.23"                  2.1L
           1999—2000    6.0L        WIK—LQ4—6.0L              2.81"                  21L
           1996—2000    74L         WIK—L29—7 .4L             2.60"                  21L

           The WhippleCharger kit includes the following main components: Twin Screw Whipple supercharger,
           two auxiliary fuel injectors with a stand alone computer, air bypass valve, 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 Order.

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

           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.

           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.

Whipple Industries, Inc.          ‘                ‘                  Executive Order D—231—16
Supercharger                                                          (Page 2 of 2)

This Executive Order is granted based on the following emissions test data submitted by the kit
manufacturer: A 1999 5.3L C1500 truck, certified to a Low Emission Vehicle (LEV) emission
                   NMOG CO            NOX        HCHO
Standards          0.160    4.4       0.4   0.018
device w/ dis      0105     1.3       0.4   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 11 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. Ifsuch 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—14, dated'June 193/%3 superseded and of no further force and effect.
 Executed at El Monte, California, this      Z         Kay/of February   2000.

                                      R. B. Stmmerfield,
                                                            { Chief
                                      Mobile Source Operations Division

Document Created: 2005-09-01 12:43:39
Document Modified: 2005-09-01 12:43:39

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