Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on June 18, 2003.
As of Wednesday, April 24th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

ModelsModification
1996-2003 model-year off-road compression-ignition engines rated at or above 25 horsepower.The Unikat Combifiltersa re actively regenerated filters that require regeneration after 8-10 hours of operation or when the backpressure monitor indicates excessive pressure. This exemption applies to Unikat Combifilters used with or without Engine Control Systems' AZ Purifier, downstream of the filters. The Unikat Combifilters and the AZ Purifier can be used on engines operated using standard California diesel or ultra-low sulfur diesel.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-420U-4
  • Executive Order 420U-4 / D420U-4
  • ARB # D-420U-4
  • Executive Order No: D-420U-4
  • C.A.R.B. No. D-420U-4
  • Resolution D-420U-4
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-420U-4 PDF

D-420U-4 Document:

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