Approval Details

Valid E.O.


This Executive Order approved the specified parts on on January 5, 1994.
As of Friday, October 18th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

1990 to 1994 Corvettes with a 5.7 liter ZR-1 engineIncludes camshaft, injector housing, plenum chamber, throttle body, and PROM chip. 475 hp kit also includes modified cylinder head

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-323-1
  • Executive Order 323-1 / D323-1
  • ARB # D-323-1
  • Executive Order No: D-323-1
  • C.A.R.B. No. D-323-1
  • Resolution D-323-1
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-323-1 PDF

D-323-1 Document:

                                                     (Page 1 of 2)

                               State of California
                               AIR RESOURCES BOARD

                         ._   EXECUTIVE ORDER D=323—1
                   Relating to Exemptions Under Section 27156
                              of the Vehicle Code

                                 DR MOTORSPORTS
                       ZR—1 ENGINE PACKAGE, 450 & 475 HP

Pursuant to the authority vested in the Air Resources Board (ARB) by Section
27156 of the Vehicle Code; and

Pursuant to the authority vested in the undersigned by Sections 39515 and
39516 of the Health and Safety Code and Executive Order G—45—5;

IT IS ORDERED AND RESOLVED:  ‘That the installation of the ZR—1 Engine
Package, 450 & 475 HP manufactured by DR Motorsports of 12832 Highway S55,
Plymouth, Minnesota 55441, 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 1990 to 1994
Corvettes equipped with a 5.7L ZR—1 gasoline engine.

DR Motoréports' ZR—1 Engine Package, 450 & 475 HP includes an injector
housing, plenum chamber, throttle body, camshaft, and a PROM chip.
The ZR—l1 Engine Package, 475 HP also includes a modified cylinder head.

This Executive Order is valid provided that the installation of the ZR—1
Engine Package, 450 & 475 HP is conducted by DR Motorsports and no changes
are made to the stock tune—up specifications.

Changes made to the design or operating conditions of the ZR~1 Engine
Package, 450 & 475 HP, as exempt by the ARB, which may adversely affect the
performance of a vehicle‘s pollution control system shall invalidate this
Executive Order.                                             j               ‘

Marketing of the ZR—1 Engine Package, 450 & 475 HP using any identification
other than that shown in this Executive Order or marketing of the ZR—1
Engine Package, 450 & 475 HP for an application other than those listed in
this Executive Order shall be prohibited unless prior approval is obtained
from the ARB.

This Executive Order does not constitute any opinion as to the effect the
ZR—1 Engine Package, 450 & 475 HP may have on any warranty either expressed
or implied by the vehicle manufacturer.

This Executive Order is granted based on results from emissions tests
conducted in accordance with Cold—Start CVS—75 Federal Test Procedure.
However, the ARB finds that reasonable grounds exist to believe that use of
the ZR—~l1 Engine Package, 450 & 475 HP 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

DR MOTORSPORTS                                      EXECUTIVE ORDER D—323—1
                                                    (Page 2 of 2)

phases.   If such test results demonstrate that the ZR—1 Engine Package, 450
& 475 HP adversely affect emissions during off—cycle conditions (defined as
those conditions which are beéyond 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
ZR—1 Engine Package, 450 & 475 HP will affect the durability of the emission
control system, DR Motorsports 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


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 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.

The Bureau of Automotive Repair will be notified by copy of this Executive
Order .

Executive Order D—323 is hereby superseded and is no longer of any force or

Executed at El Mbnte,   California,   this   Lfi   day of January 1994.

                                       Mobile Source Division

Document Created: 2005-09-01 12:44:11
Document Modified: 2005-09-01 12:44:11

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