Approval Details

Valid E.O.


This Executive Order approved the specified parts on on April 5, 2000.
As of Sunday, October 20th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
LCH4853601999 & 2000 General Motors trucks equipped with either a 4.8, 5.3, or 6.0L engine.The Exhaust Headers are a short tube style header manufactured out of 16 gage mild steel tubing. The oxygen sensor is in the stock location. Connecting pipes manufactured out of 16 gage mild steel are included.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-479-2
  • Executive Order 479-2 / D479-2
  • ARB # D-479-2
  • Executive Order No: D-479-2
  • C.A.R.B. No. D-479-2
  • Resolution D-479-2
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-479-2 PDF

D-479-2 Document:

      ~     |                                                                    (Page 1 of 2)

                                                  State of California
                                              AIR RESOURCES BOARD

                                             EXECUTIVE ORDER D—479—2
                                      Relating to Exemptions Under Section 27156
                                                 of the Vehicle Code

                                             LA POLE CUSTOM HEADERS
                                                 EXHAUST HEADERS

      Pursuant 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 1S ORDERED AND RESOLVED: That the installation of the Exhaust Headers, manufactured and
      marketed by La Pole Custom Headers, 1141 N. Cosby Way #B, Anaheim, California 92806 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:

                          Model—Year             Engine Displacement             Part No.
                          1999   to   2000       4.8, 5.3, or 6.0L               LCH485360
                          1987   to   1995       5.0 or 5.7L                     LCHSO57 C
                          1996   to   1999       5.0 or 5.7L                     LCH 5057—1
                          1987   to   1999       7.AL                            LCH 8454

      The Exhaust Headers are a short tube style header manufactured out of 16 gage mild steel tubing.
      The oxygen sensor is in the stock location. Connecting pipes manufactured out of 16 gage mild
      steel are included.

      This Executive Order is valid provided that the installation instructions for the Exhaust Headers will
      not recommend tuning the vehicle to specifications different from those of the vehicle manufacturer."

      This Executive Order shall not apply to any La Pole Exhaust Header advertised, offered for sale,
      sold with, or installed on, a motor vehicle prior to or concurrent with transfer to an ultimate purchaser.

      Changes made to the design or operating conditions of the Exhaust Headers, as exempt by the Air
      Resources Board, which adversely affect the performance of the vehicle‘s pollution control system
      shall invalidate this Executive Order.

      Exemption of the Exhaust Headers 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 Exhaust Headers
      may have on any warranty either expressed or implied by the vehicle manufacturer.

LA POLE CUSTOM HEADERS                                              Executive Order D—479—2
<—xhaust Headers                                                    (Page 2 of 2)

This Executive Order is granted based on emissions test data generated on a 1994 General Motors
5.7L C1500 truck, which is certified to a tier 1 emission standard and a 1999 General Motors 5.3L.
C1500 truck, which is certified to a low emission vehicle standard. Testing consisted of Cold Start
CVS—75 Federal Test Procedures. Emission levels of the modified vehicles either met the applicable
emission standards, or are the same or below their baseline emission levels. The following test
results are in grams per mile:

                      1999 C1500 5.3L

                  NMOG CO          NOx      HCHO
Standards         0.160    4.4    0.4       0.018
Device w/dfs      0.113     1.6   0.2        0.002

                       1994 C1500 5.7L

                  NMHC CO         NOx
Baseline          0.29 4.3        1.3
Device            0.28 4.0        1.3

This Executive Order is also based on On Board Diagnostic II (OBD II) testing conducted on the
same 1999 vehicle. Test data showed that the headers when instailed on the vehicles did not affect
the vehicle‘s ability to perform its OBD II monitoring.


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—479, dated April 1999 and D—479—1, dated March 2000, is superseded and of no
further force and effect.
                           is        is
Executed at El Monte, California, this      5
                                                444 day of April. 2000.

                                          R. B. Summerfield, Chief
                                          Mobile Source Operations Division

Document Created: 2005-09-01 12:40:31
Document Modified: 2005-09-01 12:40:31

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