Approval Details

Valid E.O.


This Executive Order approved the specified parts on on March 12, 2007.
As of Monday, October 21st, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

1990 to 2003 model year Mazda Miata vehicles powered by a 4-cylinder engine.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-453-7
  • Executive Order 453-7 / D453-7
  • ARB # D-453-7
  • Executive Order No: D-453-7
  • C.A.R.B. No. D-453-7
  • Resolution D-453-7
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-453-7 PDF

D-453-7 Document:

                                     State of California
                                 AIR RESOURCES BOARD

                               EXECUTIVE ORDER D-453-7
                        Relating to Exemptions Under Section 27156
                                     of ,the Vehicle Code

                                       Moss Motors
                                   Mazda Supercharger Kit

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-02-003;

IT IS ORDERED AND RESOLVED: That the installation of the Mazda Supercharger Kit,
manufactured and marketed by Moss Motors, 5760 Thornwood Drive, Goleta, California
93117 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 all 1990 to 2003 model year Mazda Miata vehicles powered by a 4-cylinder

Moss Motors' Mazda Supercharger Kit includes an Eaton supercharger designed to give a
maxim~,~m  boost of 6 psi., add-on digital fuel management module to increase fuel flow
during boost conditions, and an aftermarket open element air cleaner to replace the original
air cleaner. Modifications to the emissions control system include a relocation of the throttle
body, and a 4 degree retard in ignition timing. The following are the applicable pulley sizes:

Application                        Crank Pulley              Supercharger
1990-1993 Mazda Miata                 5.12"                     2.9"
1994-2003 Mazda Miata                  5.12"                    2.6"

This Executive Order is valid provided that the installation instructions for the Mazda
Supercharger Kit will not recommend tuning the vehicle to specifications different from those
submitted by Moss Motors. Moss Motors recornmends that or~ly92 octane fuel be used.

Changes made to the design or operating conditions of the Mazda Supercharger Kit, 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 Mazda Supercharger Kit advertised, offered for
sale, sold with, or installed on a new motor vehicle prior to or concurrent with transfer to an
ultimate purchaser.

Marketing of the Mazda Supercharger Kit using any identification other than that shown in
this Executive Order or marketing of the Mazda Supercharger Kit 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 Mazda Supercharger Kit shall not be

construed as an 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 Mazda
Supercharger Kit niay have on any warranty either expressed or implied by the vehicle

This Executive Order is granted based on previously submitted emission test data, for Moss
Motors (D-353-5), on a 1994 Mazda Miata, certified to a Tier 1 emission standard and a
1998 Honda Civic certified to the Low Emission Vehicle I Low Err~issionVehicle emission
standards. The emission test results in the modified configuration were below the applicable
certification standards. Examination of the OBD II system on a 1999 Mazda Miata and a
1998 Honda Civic, both modified with a supercharger kit, showed no affect on the vehicles'
OBD II system operation.

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 deterniination is made after the
hearing that grounds for revocation exist.

Executed at El Monte, California, this     /J 4.1
                                                day of March 2007.

                           'y&nette        Hebert, Chief
                                   Mobile Source Operations Division

                    MOSS MOTORS - SUPERCHARGER KIT - D-453-7

Document Created: 2007-04-30 14:17:52
Document Modified: 2007-04-30 14:17:52

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