Approval Details

Valid E.O.


This Executive Order approved the specified parts on on October 19, 1998.
As of Wednesday, October 16th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
P4529416, P4876251, P4876252, P486-91 4.0L 6 JEEP, 97 DAKOTA V-8 4WD/AUTO, 97DAKOTA V-8 2WD/MANUAL, 97 DAKOTA V-8 2WD/AUTO, 96-99 V-8 B-VAN, 97-99 JEEP WRANGLER TJ 4.0L 6CYL, 97 DAKOTA V-8 4WD/MANUAL, 94-95 V-8 RAM 2WD 5 SPEED, 94-95 V-8 RAM 4WD 5 SPEED, 96-99 V-8 RAM 4WD 5 SPEED, 98/99 GRAND CHEROKEE 5.2/5.9L V8, 98/99 DURANGO, 98/99 DAKOTA 360, 86-91 4.0L JEEP, 98/99 2WD DURANGO, 93-95 V-8 GRAND CHEROKEE, 94/95 V-10 RAM 2WD & 4WD, 96 DAKOTA 2WD/AUTO V-8, 96 DAKOTA 2WD/MANUAL V-8, 96 DAKOTA 4WD V-8, 96-99 RAM 2WD/AUTO V-8, 96-99 RAM 2WD / MANUAL V-8, 96-99 RAM 4WD/AUTO V-8, 96-99 RAM V-10 CALIFORNIA ONLY, 96-99 RAM V-10 FEDERAL, 96 DAKOTA 2WD 4 CYL, 96 DAKOTA 2WD V-6, 96-98 GRAND CHEORKEE 5.2/5.9L V-8, 96-99 JEEP CHEROKEE 6 CYL, 95-99 JEEP WRANGLER YJ 6 CYL,Mike Leach's Exhaust Headers are a long tube style header that may require the use of a connecting Y pipe for installation, both are manufactured out of 14 gage mild steel. The oxygen sensor is located either in the header's collector pipe or remains at the stock location in front of the catalyst

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-401-2
  • Executive Order 401-2 / D401-2
  • ARB # D-401-2
  • Executive Order No: D-401-2
  • C.A.R.B. No. D-401-2
  • Resolution D-401-2
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-401-2 PDF

D-401-2 Document:

                                                                                  (Page 1 of 2)

                                                    State of California
                                               AIR RESOURCES BOARD

                                             EXECUTIVE ORDER D—401—2
                                      Relating to Exemptions Under Section 27156
                                                   of the Vehicle Code

                                               MIKE LEACH COMPANY
                                                 EXHAUST HEADER

 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 Sections 39515 and 39516 of the Health and Safety Code and
Executive Order G—45—9;

ITIS ORDERED AND RESOLVED: That the installation of the Exhaust Header manufactured by the Mike Leach
Company of 1443 W. Collins, P.O. Box 3725, Orange, California 92667 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 Chrysler trucks listed in Exhibit A, which is attached hereto and
incorporated herein.

Mike Leach‘s Exhaust Headers are a long tube style header that may require the use of a connecting Y pipe for
installation, both are manufactured out of 14 gage mild steel. The oxygen sensor is located either in the header‘s
collector pipe or remains at the stock location in front of the catalyst.

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

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

Marketimng of the Exhaust Header using any identification other than that shown in this Executive Order or marketing
of the Exhaust Header for an application other than those listed in this Executive Order shall be prohibited unless
prior approval is obtained from the Air Resources Board.

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

This Executive Order is granted based on the following submitted emissions test data on a 1998 Ram 1500 truck
certified to a low emission vehicle standard which showed that the vehicle in the modified configuration met the
applicable emission standards. Testing consisted of one Cold Start CVS—75 Federal Test Procedures in the modified
configuration. The following test results are in grams per mile with deterioration factors applied:

                       NMOG     CO      NOX       HCHO
Standard               0.16     4.4     0.4       0.018
Device                 0.12     2.2     0.2       0.003

This Executive Order is also based on On Board Diagnostic II (OBD II) testing conducted on the same vehicle. Test
 ~ ta showed that the headers when installed on the vehicle did not affect the vehicle‘s ability to perform its OBD II
, «onitoring.

MIKE LEACH COMPANY                                                    EXECUTIVE ORDER D—401—2
EXHAUST HEADER                                                        (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 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
Executed at El Monte, California, this _/_i’ day of October 1998.

                                           B. Summerfield,
                                           obile Source Operations Division

                           Exhibit A

P4529416 86—91 4.0L 6 JEEP
P4876251   97 DAKOTA V—8 4WD/AUTO
P4876252 . 97DAKOTA V—8 2WD/MANUAL
P4876258 97 DAKOTA V—8 2WD/AUTO
P4876259 96—99 V—8 B—VAN
P4876260 97—99 JEEP WRANGLER TJ 4.0L 6CYL
P4876566 97 DAKOTA V—8 4WD/MANUAL
P4876680 94—95 V—8 RAM 2WD 5 SPEED
P4876681   94—95 V—8 RAM 4WD 5 SPEED
P4876682 96—99 V—8 RAM 4WD 5 SPEED
P4876773 98/99 GRAND CHEROKEE 5.2/5.9L V8
P4876815 98/99 DURANGO
P4876901   98/99 DAKOTA 360
P4876918 86—91 4.0L JEEP
P5007091   98/99 2WD DURANGO
P5249531   93—95 V—8 GRAND CHEROKEE
P5249763 94/95 V—10 RAM 2WD & 4WD
P5249960 96 DAKOTA 2WD/AUTO V —8
P5249961   96 DAKOTA 2WD/MANUAL V—8
P5249962 96 DAKOTA 4WD V—8
P5249963 96—99 RAM 2WD/AUTO V—8
P5249964 96—99 RAM 2WD / MANUAL V—8
P5249965 96—99 RAM 4WD/AUTO V—8
P5249966 96—99 RAM V—10 CALIFORNIA ONLY
P5249967 96—99 RAM V—10 FEDERAL
P5249968 96 DAKOTA 2WD 4 CYL
P5249969 96 DAKOTA 2WD V—6
P5249970 96—98 GRAND CHEORKEE 5.2/5.9L V—8
P5249971   96—99 JEEP CHEROKEE 6 CYL
P5249972 95—99 JEEP WRANGLER YJ 6 CYL

Document Created: 2010-07-06 11:26:37
Document Modified: 2010-07-06 11:26:37

Previous E.O. D-401-1 | Previous E.O. D-400 | Next E.O. D-401-3 | Next E.O. D-402