Approval Details

Valid E.O.


This Executive Order approved the specified parts on on February 14, 2002.
As of Thursday, October 17th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModels

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-411-4
  • Executive Order 411-4 / D411-4
  • ARB # D-411-4
  • Executive Order No: D-411-4
  • C.A.R.B. No. D-411-4
  • Resolution D-411-4
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-411-4 PDF

D-411-4 Document:

                                        State of California
                                    AIR RESOURCES BOARD

                                  EXECUTIVE ORDER D—411—4

                           Relating to Exemptions Under Section 27156
                                        of the Vehicle Code

                              Gibson Performance Exhaust Systems
                                        Exhaust Headers

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 Exhaust Headers, manufactured
and marketed by Gibson Performance Exhaust Systems, 1270 Webb Circle, Corona, California
92879 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 General Motors, Chrysler, and Ford truck applications listed in Exhibit A.

The Exhaust Headers are a shorty style header that is manufactured out of either 16 gage
stainless steel or 14 gage mild steel. The headers bolt to the stock connecting pipes and retain
the oxygen sensor in the original location.

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

This Executive Order shall not apply to any Exhaust Headers 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.

This Executive Order is granted based on emissions test data generated on a 1997 General
Motors 5.7L C1500 and a 1997 Dodge Ram, both certified to the tier 1 emission standards and
a 1999 General Motors 5.3L C1500 and a 1998 Ford Expedition, both certified to the low
emission vehicle standards. Testing consisted of Cold Start CVS—75 Federal Test Procedures.
Emission levels of the modified vehicles met the applicable emission standards. The following
test results are in grams per mile:

1997 5.7L General Motors Full Size Truck                      1998 5.4L Ford Expedition

                  NMHC CO         NOX              NMOG CO          NOX HCHO
Standards         0.32 4.4         0.7             0.195 5.0        0.6 0.022
device w/ dfs     0.20  3.0       0.5              0.118 1.8        0.2 0.002

1997 5.9L Dodge Ram Truck                .         1999 5.3L General Motors Full Size Truck

                  NMHC CO         NOX              NMOG CO          NOX HCHO

Standards         0.32     4.4     0.7             0.160      4.4   0.4   0.018
device w/ dfs     0.13     2.6    0.5              0.094      1.5   0.3   0.002

This Executive Order is also based on On—Board Diagnostic !I (OBD I1) tests conducted on the
same test vehicles. Test data showed that the headers when installed 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 is made after the hearing that grounds
for revocation exist.

Executive Order D—411—3, dated August 1998, is superseded and of no further force and effect.

Executed at El Monte, California, this       /‘/fl day of February 2002.            |

                                         Allen igons, Chief
                                         New Vehicle/Engine Programs Branch


                                                   EXHIBIT A

                        _GIBSON HEADER APPLICATIONS

                                                                                                 CHROME     STAINLESS

|YEAR                                APPLICATION                                  ENGINE          PART# PART #
                                      CHEVY/IGMC                                                           _
88—95          CHEVY TRUCKS, SUBURBANS, VANS,BLAZER W/O AIR INJECTI                305—350       GP100      GP1008S
88—95          CHEVY TRUCKS, SUBURBANS, VANS W/ AIR INJECTION                      305—350       GP101      GP101S
96—00          CHEVY TRUCKS, SUBURBANS, VANS, YUKON,TAKHOE                         305—350       GP102      GP102S
73—87          CHEVY TRUCKS, SUBURBANS, VANS W/CARBURETOR                            454         GP103      GP103S
88—95          CHEVY TRUCKS, SUBURBANS, VANS W/O AIR INJECTION                       454         GP104      GP104S
88—95          CHEVY TRUCKS, SUBURBANS, VANS W/ AIR INJECTION                        454         GP105      GP105S
96—00          CHEVY TRUCKS, SUBURBANS, VANS                                         454         GP106      GP106S
75—89          CHEVY MOTORHOMES W/O AIR INJECTION                                    454         GP107      GP107S
75—89          CHEVY MOTORHOMES W/ AIR INJECTION                                     454         GP108      GP108S
86—89          CHEVY MOTORHOMES W/ DUAL AIR PUMPS                                    454         GP109      GP109S
90—95          CHEVY MOTORHOMES W/FUEL INJECTION                                     454         GP110      GP1108S
96—00          CHEVY MOTORHOMES WITH VORTECH ENGINE                                  454         GP111      GP111S
96—00          CHEVY TRUCKS (NO SUBURBANS) SUBURBAN                                  454         GP113      GP113S
98—00          CHEVY TRUCKS (NO SUBURBANS) SUBURBAN,,DENALI                        305/350       GP114      GP114S
88—95          CHEVY TRUCKS FULL SiZE W/O AIR AND 02 SENSOR                        4.3L V—6      GP120      GP1208
88—95          CHEVY TRUCKS FULL SIZE W/AIR INJECTION                              4.3L V—6      GP121      GP121S
88—95          CHEVY S—10/8—15                                                     4.3L V—6      GP122      GP122S
96—97          CHEVY S—10/8S—15                                                    4.3L V—6      GP123      GP123S
96—00          CHEVY FULLSIZE NO AIR                                               4.3L V—6      GP118      GP118S
96—00          CHEVY S—10 W/EGR                                                    4.3L V—6      GP117      GP117S
00—02          CHEVY TRUCK DENALI,ESCALDALE,YUKONXL,SUBURBAN                         6.0L        GP119      GP119S
99—01+*        CHEVY TRUCKS NO AIR YUKON,XL. TAHOE,SUBURBAN                     4.8, 5.3, 6.0L   GP115      GP115S
99—01*         CHEVY TRUCKS W/AIR YUKON,XL, TAHOE,SUBURBAN                      4.8, 5.3, 6.0L   GP116      GP116S
2002*          CHEVYTRUCK SILVERADO,SIERRA, AVALANCHE                             5.3L,4.8L.     GP129      GP129S
2001—02        CHEVY SILVERADO,SIERRA ,YUKON XL,SUBURBAN w AIR INJE                  8.A1L       GP 130     GP130S
2001—02        CHEVY SILVERADO, SIERRA , YUKON XL, SUBURBAN w NO AIR                 8.1L        GP131      GP131S
92—95          DODGE TRUCK , DAKOTA                                               5.2L/5.9L      GP300      GP300S
96—98          DODGE TRUCK, DAKOTA,DURANGO                                        5.2L/5.9L      GP301      GP301S
96—98          DODGE TRUCK                                                        8.0L—V10       GP302      GP302S
94—95          DODGE TRUCK                                                        8.0L—V10       GP303      GP303S
96—98          DODGE TRUCKS                                                       8.oL—V10       GP304      GP304S
92—95          DODGE TRUCKS                                                       3.9L — V6      GP305      GP305S
96—98          DODGE TRUCKS                                                       3.9L — V6      GP306      GP306S

* vehicles that are emissions certified to the Ulitra—Low Emissions Vehicle (ULEV) standards are excluded

[YEAR                    APPLICATION   ENGINE      PART# PART #
87—97   FORD TRUCKS, BRONCO              302      GP200 .   GP200S
86—97   FORD TRUCKS, BRONCO              351      GP201     GP201S
83—87   FORD TRUCKS                    460 CARB   GP202     GP202S
88—93   FORD TRUCKS                     460 Fi    GP203      GP203S
93—97   FORD TRUCKS                     460 Fi    GP204     GP204S
93—97   FORD TRUCKS                      460 Fi   GP209     GP209S
88—98   FORD TRUCKS                      460 FI   GP205      GP205S
97—01   FORD TRUCKS, EXPEDITION           5.AL    GP206     GP206S
97—01   FORD TRUCKS, EXPEDITION           4.6L.   GP207      GP207S
97—01   FORD TRUCKS                     4.2L/6    GP214     GP214S
96—98   FORD TRUCKS                      460 FI   GP210     GP2108
98—00   FORD TRUCKS                       10      GP211     GP211S
00—01   FORD EXCURSION                   5AL      GP126     GP126S
00—01   FORD EXCURSION                   G.8L     GP125     GP125S
99—01   FORD TRUCK SUPERDUTY             5.AL     GP126     GP126S

95—00   FORD CLASS A MOTORHKOMES         460 FI   GP208      GP208S
86—89   FORD CLASS A MOTORKOMES        460 CARB    GP209    GP209S
88—93   FORD CLASS A MOTORKOMES          460 FI   GP212     GP212S
93—94   FORD CLASS A MOTORHOMES          460F1    GP213     GP213S
98—01   FORD CLASS A MOTORHKOMES          6.8L    GP125     GP125S

91—95   WRANGLER                         4.0L     GP400     GP400S
93—99   CHEROKEE, GRAND CHEROKEE         4.0L     GP400     GP400S

Document Created: 2005-09-01 12:41:54
Document Modified: 2005-09-01 12:41:54

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