Approval Details

Valid E.O.


This Executive Order approved the specified parts on on June 7, 1999.
As of Saturday, October 19th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
530050C1996-1997 GM C/K 1500/2500/3500 5.0L with 73mm pulley diameterThe WhippleCharger kit includes the following main components: Twin Screw 1.6L Whipple supercharger, two auxiliary fuel injectors with a stand alone computer, and an air bypass valve. The stock closed element air cleaner and crankshaft pulley are maintained.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-231-15
  • Executive Order 231-15 / D231-15
  • ARB # D-231-15
  • Executive Order No: D-231-15
  • C.A.R.B. No. D-231-15
  • Resolution D-231-15
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-231-15 PDF

D-231-15 Document:

                                                                               (Page 1 of 2)

                                                State of California
                                           AIR RESOURCES BOARD

                                        EXECUTIVE ORDER D—231—15
                                  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 Street, 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 applications:

Year      Engine      Body (2/4wd)                  Kit #s             Pulley Diameter
1996/97 5.0L          C/K 1500/2500/3500            530050C                73mm
                                                    530051C                7Omm
1998/99                                             530052C                73mm
                                                    530053C                7Omm

1996/97 5.7L          CIK 1500/2500/3500            530150C                7Omm
                                                    530151C                66mm
1998/99                                             530152C                7Omm
                                                    530153C                G66mm

1996/97 7.4L          C/K 2500/3500, &              710150C                6Omm
                      Motorhomes                    710151C                57mm
1998/99                                             T710152C               6Omm
                .                                   710153C                57mm

The WhippleCharger kit includes the following main components: Twin Screw 1.6L Whipple supercharger, two
auxiliary fuel injectors with a stand alone computer, and an air bypass valve. The stock closed element air
cleaner and crankshaft pulley are maintained.

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.

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

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—15
‘ Supercharger                                                               (Page 2 of 2)

 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, and equipped with a
 Whipple 2.1L supercharger (Executive Order D—215—14).

                       NMOG        CO      NOX        HCHO
 Standards             0.160       4.4     0.4        0.018
 device w/ dfs         0.105       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 ColdStart 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 instaliled 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 Orders D—231—11 and D—231—12, dated February, 1998 and December, 1998, is superseded and of no
  further force and effect.                  U
                               j                 #
  Executed at El Monte, California, this    2        day of   Jane 1999.

                                           R.   Summerfield, XChief
                                           Mobile Source Operations Division

Document Created: 2005-09-01 12:42:11
Document Modified: 2005-09-01 12:42:11

Previous E.O. D-231-14 | Previous E.O. D-230 | Next E.O. D-231-16 | Next E.O. D-232