ARB verifies Dinex DiSiC diesel particulate filter

The California Air Resources Board (ARB) has verified the Dinex DiSiC (Level 3 Plus) diesel particulate filter for use on most trailer Transport Refrigeration Units (TRUs) using 1999–2005 model year engines.

ARB has verified the Dinex DiSiC (Level 3 Plus) diesel particulate filter, which can be used to comply with the Low-Emission TRU (LETRU) and Ultra-Low Emission TRU (ULETRU) in-use performance standards on most trailer TRUs using 1999–2005 model year engines. Compliance information related to the TRU Airborne Toxic Control Measure is available at

The Dinex DiSiC consists of a catalyzed silicon carbide filter substrate in a filter assembly module, inlet, outlet, exhaust tubes, flexible parts, mounting brackets, and insulation. An electronic monitoring system measures and logs exhaust temperature, back pressure, and alarms. The warning system includes a series of LED lights to provide back-pressure warning for filter cleaning.

TRU owners should read about the specific conditions for which the DiSiC has been approved in the Executive Order (EO) posted on ARB’s Verification Procedure–Level 3 webpage at Specific engine models and families that apply are listed in the EO’s attachment, also listed on that webpage.

Diesel Emissions Specialists (DES) is the exclusive marketing agent for Dinex Exhausts’ DiSiC. DES can be reached at 1-888-759-3587 or

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.