Verification Procedure - Formerly Verified - Level 1

This page last reviewed January 20, 2009

PLEASE NOTE: The following systems are no longer verified and do not meet the requirements for any on-road or off-road rule compliance options.   They cannot be sold after the date shown below, however, all warranty obligations will be fulfilled until  the warranty expiration date is met.

Verifications were issued chronologically. The most recent Executive Order would have been in effect at the time of de-verification. For details on prior verification for each system, please view the specific Executive Orders and attachments by date.

Extengine ADEC
As of October 23, 2012

Engine Control Systems

As of March 5, 2012
The following system(s) are listed as formerly verified at the company's request. The product is no longer commercially available.

The ARB has verified Engine Control System's AZ Purifier and AZ Purimuffler for certain 1991 to 2003 model year, medium heavy-duty Cummins and Navistar/International diesel engines used in on-road applications operating on ultra low sulfur diesel fuel. The verification has been extended to include certain 1973-1993 model year Detroit Diesel Corporation engines used in on-road applications operating on CARB diesel as well as certain Cummins and DDC heavy heavy-duty engines model year 1991-2002, four stroke, used in on-road applications with ultra low sulfur diesel fuel. The AZ Purifier and AZ Purimuffler uses a diesel oxidation catalyst to achieve a 25 percent reduction in particulate matter emissions, qualifying it for a Level 1 verification. Specific engine families and conditions for which AZ Purifier and AZ Purimuffler have been approved may be found in the Executive Order which is listed below.

The ARB has verified the following Engine Control System's AZ Purifier and AZ Purimuffler for 1996 to 2002 model year off-road diesel engines. The application includes off-road equipment at ports, railway yards, and other intermodal / freight operation. The verification requires the use of ultra low sulfur diesel fuel that contains a maximum of 15 ppm sulfur. The Executive Order includes restrictions for this verification. Please click on the link below for a list of engine families for which the system has been verified.

The following systems do not comply with the new 2007 NO2 emissions limit, and are no longer verified.

The ARB verified the Cleaire Flash and Match™ oxidation catalyst based system for use with specific 1993 through 1998 model year diesel engines in on-road applications. The system combines a diesel oxidation catalyst with engine modifications to achieve 25 percent PM reductions, and under certain conditions, a reduction in NOx of 2  percent. This verification applies only to Cummins M11 engines, for steady state applications (e.g. long haul trucks). Other restrictions which apply to these verifications may be found in the verification letters.

The ARB has verified the following Paceco Corporation's Mitsui Engineering and Shipbuilding Diesel Particulate Filter for pre-1996 model year or Tier 1, 2 or 3 certified off-road diesel engines on rubber-tired gantry cranes with a rated power of 225 kW to 450 kW. The Executive Order includes restrictions for this verification.