Approval Details

Valid E.O.


This Executive Order approved the specified parts on on October 30, 2009.
As of Tuesday, October 15th, 2019 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
HES 2101984-2004 model year Caterpillar, Cummins, Detroit Diesel, and International heavy-duty diesel engines from 7.2 liters to 16.2 liters.Rubber hose from device is connetcted to the low pressure side of the turbo.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-634-1
  • Executive Order 634-1 / D634-1
  • ARB # D-634-1
  • Executive Order No: D-634-1
  • C.A.R.B. No. D-634-1
  • Resolution D-634-1
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-634-1 PDF

D-634-1 Document:

                                   State of California
                               AIR RESOURCES BOARD

                              EXECUTIVE ORDER D-634-1

                             Relating to Exemptions under
                           Section 27156 of the Vehicle Code

                                     HZXOP, Inc.
                              Hydrogen Enrichment System

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-02-003;

IT IS ORDERED AND RESOLVED: That installation of the Hydrogen Enrichment
System, manufactured by HZXOP, Inc. (3199-D Airport Loop Dr. Costa Mesa, CA
92626), has been found not to reduce the effectiveness of the applicable vehicle
pollution control systems, and therefore, the Hydrogen Enrichment System (HES 210) is
exempt from the prohibitions in Section 27156 of the Vehicle Code for installation on
1984-2004 model year Caterpillar, Cummins, Detroit Diesel, and International heavy-
duty diesel engines from 7.2 liters to 16.2 liters.

The HES 210 device consists of a metal case containing a 3-gallon ABS water
reservoir, various electrical components, electrical wiring and connectors, and a rubber
supply hose for the hydrogen gas.

This Executive Order is based on Heavy-Duty Federal Test Procedure (FTP) Transient
Cycle tests, Euro Ill European Stationary Cycle (ESC) test, and "Not-to-Exceed" (NTE)
test conducted by H2XOP, Inc. with the HES 210 device.

If evidence provides the Air Resources Board with reasons to suspect that the HES 210
device will affect the durability of the emission control system, H2XOP shall be required
to submit durability data to show that the durability of the vehicle emission control
system is not, in fact, affected andlor that the add-on or modified parts demonstrate
adequate durability.

This Executive Order is valid provided that installation instructions for the HES 210
device do not recommend tuning the vehicles to specifications different from those of
the vehicle manufacture.

Changes made to the design or operating conditions of the HES 210 device, as exempt
by the Air Resources Board, which adversely affect the performance of the vehicle's
emission control system, shall invalidate this Executive Order.

Marketing of the HES 210 device using identification other than that shown in this
Executive Order or for an application other than that listed in this Executive Order shall
be prohibited unless prior approval is obtained from the Air Resources Board.
                                HZXOP, INC.
                     HYDROGEN GENERATOR DEVICE - D-634-1

Exemption of the HES 210 device 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 shall not apply to any HES 210 device advertised, offered for sale,
sold with, or installed on a motor vehicle prior to or concurrent with transfer to,an
ultimate purchaser.

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

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

In addition to the foregoing, the Air Resources Board 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
California Code of Regulations, Title 13, Section 2222, et seq.


Violation of any of the above conditions shall be grounds for revocation of this Executive
Order. The Executive Order may be revoked only after a ten day written notice of
intention to revoke the Executive Order, in which period the holder of the Executive        -
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 Executive
Order may not be revoked until a determination is made after the hearing that grounds
for revocation exist.

Executive Order D-634 dated March 27,2008, is hereby superseded and of no further
force and effect.

Executed at El Monte, California, this   3        day of October 2009.

                            Annette Hebert, Chief
                            Mobile Source Operations Division

                                H2XOP, INC.
                     HYDROGEN GENERATOR DEVICE - D-634-1

Document Created: 2010-02-03 12:19:01
Document Modified: 2010-02-03 12:19:01

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