Approval Details

Valid E.O.


This Executive Order approved the specified parts on on March 7, 1991.
As of Sunday, July 14th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
ATS 6.9L/7.3L1983-1987 Ford heavy-duty vehicles powered by a 6.9L Navistar Intl. heavy-duty diesel engine 1988-1991 Ford heavy-duty vehicles powered by a 7.3L Navistar Intl. heavy-duty diesel engineReplacement air cleaner, exhaust system, and crankcase depression regulator

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-171-5
  • Executive Order 171-5 / D171-5
  • ARB # D-171-5
  • Executive Order No: D-171-5
  • C.A.R.B. No. D-171-5
  • Resolution D-171-5
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-171-5 PDF

D-171-5 Document:

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