Approval Details

Valid E.O.


This Executive Order approved the specified parts on on June 18, 2003.
As of Monday, July 22nd, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1987-2003 4-stroke turbocharged or naturally-aspirated on-road heavy-duty diesel engines rated between 50 and 750 hp, certified to particulate matter emission standards of 0.60 g/bhp-hr or less and not otherwise equipped with an aftertreatment emission control system such as a catalytic converter or a diesel particulate filter.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-393-8
  • Executive Order 393-8 / D393-8
  • ARB # D-393-8
  • Executive Order No: D-393-8
  • C.A.R.B. No. D-393-8
  • Resolution D-393-8
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-393-8 PDF

D-393-8 Document:

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