Approval Details

Valid E.O.


This Executive Order approved the specified parts on on October 28, 1999.
As of Monday, October 21st, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModels
16851-98A, 16854-98A, and 16976-1340 Performance Cylinder Heads 1984-1999 Harley-Davidson motorcycles equipped with a 1338 cc Carb/FI engine

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-338-24
  • Executive Order 338-24 / D338-24
  • ARB # D-338-24
  • Executive Order No: D-338-24
  • C.A.R.B. No. D-338-24
  • Resolution D-338-24
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-338-24 PDF

D-338-24 Document:

                                                                                       (Page 1 of 2)

                                               State of California
                                           AIR RESOURCES BOARD

                                        EXECUTIVE ORDER D—338—24
                                  Relating to Exemptions Under Section 27156
                                              of the Vehicle Code

                                             CYLINDER HEADS

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 1340 Performance Cylinder Heads,
Lightning Cylinder Heads, and XLS Cylinder Heads manufactured and marketed by the Harley—Davidson
Motor Company, 3700 W. Juneau Avenue, P.O. Box 653, Milwaukee, Wisconsin 53201 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 Harley—Davidson motorcycles.

Device                      Part Numbers                  Model—Year       Engine Displacement

1340 Performance             16851—98A, 16854—98A,        1984—1999        1338 cc Carb/FI
Cylinder Heads              and 16976—99A

S$1 Lightning                16457—96, 16458—96,          1991—1999        1200 cc Carbureted
Cylinder Heads               16459—96, and 16460—96

XLS Cylinder Heads           16457—96B, 16458—96B,        1991—2000        1200 cc     Carbureted
                             16459—96B, and 16460—96B

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

This Executive Order is granted based on the following submitted emissions test data:

                         1996 Harley—Davidson 1338 ce                            1994 Harley—Davidson 1200 cc
                   Carbureted Model    Fuel Injected Model                            Carbureted Model
                       (gm/km)              (gm/km)                                        (gm/km)

                      HC          CO          HC        CO                                 HC       CO
Standards             1.0        12.0         0.9       12.0          Baseline            1.30      6.94
device w/ dfs         0.87        6.5         0.7        5.5          S$1 Cyl. Heads      1.30      7.83

Test results showed that tailpipe emissions with the modified cylinder heads installed were at or below the
1996 Harley—Davidson‘s applicable emission standard, and within the allowable limits for comparative
emissions testing on the 1994 Harley—Davidson.

EARLEY—DAVIDSON                                                      EXECUTIVE ORDER D—338—24
CYLINDER HEADS                                                       (Page 2 of 2)

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

Marketing of the cylinder heads using any identification other than that shown in this Executive Order or
marketing of the cylinder heads 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 the cylinder heads
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 cylinder heads may have
on any warranty either expressed or implied by the vehicle manufacturer.

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 seq.


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 Order D—338—22, dated December 1998, is superseded and of no further force and effect.

Executed at E1 Monte, California, this   _2day of October 1999.

                                      R. B. Summerfield, Chief
                                      Mobile Source Operations Division

Document Created: 2005-09-01 12:44:29
Document Modified: 2005-09-01 12:44:29

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