Approval Details

Valid E.O.


This Executive Order approved the specified parts on on July 22, 1992.
As of Tuesday, October 15th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModels
9030911990-1992 Ford Thunderbirds and Mercury Cougars powered by a 5.0 Liter V-8 with EFI gasoline engine.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-241-2
  • Executive Order 241-2 / D241-2
  • ARB # D-241-2
  • Executive Order No: D-241-2
  • C.A.R.B. No. D-241-2
  • Resolution D-241-2
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-241-2 PDF

D-241-2 Document:

                                                                                                                           (Page 1 of 2)

                                                           State of California
                                                           AIR RESOURCES                   BOARD

                                                      EXECUTIVE ORDER D—241—2
                                Relating to Exemptions Under Section 27156
                                                           of the Vehicle Code

                                                M.A.C. PRODUCTS, INC.
                                          DIRECT REPLACEMENT EXHAUST SYSTEM
                                            STUBBIE HEADER, MODEL # 903091

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
39516 of the Health and Safety Code and Executive Order G—45—5;

IT IS ORDERED AND RESOLVED: ° That the installation of the Stubbie Header
Model No. 903091 constructed out of #16 gage steel and manufactured by
M.A.C. Products, Inc. of 1410 W. Gaylord St., Long Beach CA 90813—1334, has
been found not to reduce the effectiveness of required motor vehicle
pollution control devices, and therefore is exempt from the prohibitions of
Section 27156 of the Vehicle Code for 1990—1992 Ford Thunderbirds and
Mercury Cougars powered by a 5.0 liter V—8 with EFI gasoline engine.

This Executive Order is valid provided that installation instructions for
this device will not recommend tuning the vehicle to specifications
different from those submitted by the device manufacturer.

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

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

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


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M.A.C. PRODUCTS,   INC.                                          . EXECUTIVE ORDER D—241~2
                                                                   (Page 2 of 2)

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 communications.

Section 17500 of the Business and Professions Code makes untrue or
misleading advertising unlawful, and Section 17534 makes violation
punishable as a misdemeanor.

Section 43644 of the Health and Safety Code provides as follows:

     "43644,  (a)  No person shall install, sell offer for sale, or
     advertise or except in an application to the state board for
     certification of a device,     represent,           any device as a motor vehicle
     pollution control device for use on any used motor vehicle unless that
     device has been certified by the state board.                No person shall sell,
     offer for sale, advertise, or represent any motor vehicle pollution
     control device as a cert&fied device which, in fact, is not a certified
     device.  Any violation "Sf this subdivision is a misdemeanor."

Any apparent violation of the conditions of this Executive Order will be   _
submitted to the Attorney General of California for such action as he deems
advisable.                                               ?

Executed at El Monte,     California,   this 2_2‘        day of July,   1992.

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                                           Mobile Sourc

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one   7/16", 1/2", 9/16" socket and wrench
one   3/8" drive extension and ratchet
one   5/8" socket with 1/2" drive extension and ratchet
one   11/16" wrench, one 3/8" drive,10mm socket
one   flat screwadriver, and one flat file

1.    Remove airfilter cover and set aside with air filter. Next remove the two air filter box nuts from fender wall
      using 7/16" socket with extension and ratchet. Proceed by removing air filter box.

2.     Next remove mass air flow system by removing the two screwswith a 10mm socket located on the shock
      tower. Then take a screwdriver and loosen the clamp securing air flow system to throttle body and remove
      air flow system. Continue by removing all spark plugs oil dipstick tube, bracket holding air tube on header
      and bracket from altemator to header.

3.     Next you will need two jack stands and a jack in order to lift front tires off ground a couple of inches.
      (Optional Procedure) it is possible to perform the following steps without stands. but slight elevation
      of car may be needed to gain access to Y—pipe and header connection.

4.     Next go under car and remove nuts securing Y—pipe to stock header system on both sides of car. You will
      need to remove air injection tube located on passenger side header to gain access to nuts attaching
      header to Y—pipe and to allow for removal of header.

5.: Next go back to top of car— with 9/16" socket, extension, andratchet removing all header bolts on both
      headers. Proceed to remove stock headers from car. After removal of stock headers use a scraper to
      remove any old gasket material that might be adhered to exhaust port.

6.    Take passenger side header in hand, slide header down into position. Once in place tighten down all
      header bolts to proper specifications with your 7/16‘ wrench.

7.    Tighten down all header boits except bolts used to hold brackets on stock header. Take brackets and
      install them back in original positions, they may have to be slightly modified.

8.    Proceed to driver‘s side and slide header into position for installation. Take file and file away a portion of
      the dipstick bracket as shown in the illustration on top of page. Then tighten header bolits to specification
      with your 7/16" wrench and install dipstick back in stock location.

9.    After tightening down both headers, you will need to go under vehicle again with the four 7/16" bolt, nuts
      and washers. You will also need a 5/78" socket with a half inch drive extension and ratchet. From the bottom
      of the car starting with the passenger side. Push one boit with washer through flange on Y—pipe and flange
      on stubbie collector to attach 7/16" nut to collector side. You will need 11/16" wrench to hold nut while
      tightening. While tightening boits on both sides of vehicle make sure that both are tightened equally while
      brought up to proper torque specifications.

10. After Y—pipe to stubbie bolts are tightened proceed to the top of vehicle and lower car to the ground.
    Proceed by replacing all original parts on vehicle as they were removed. You will need to re—tighten header
    bolits after several hours of driving due to expansion with heat they become loose within the head.

Document Created: 2005-09-01 12:40:32
Document Modified: 2005-09-01 12:40:32

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