Approval Details

Valid E.O.


This Executive Order approved the specified parts on on July 28, 1983.
As of Saturday, April 20th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
45001978-1983 GM heavy-duty vehicles with a gross vehicles weight (GVW) over 8,500 pounds and powered by a 454 CID engine. 1977 and older GM heavy-duty vehicles with a GVW over 6,000 pounds and powered by a 4564 CID engine. 1978-1979 medium duty GM vehicles with a GVW between 6,001 and 8,500 pounds and powered by a 454 CID engines.Replace OEM metering rods with P/N 52P & AX, install water injection and EGR P/N PF7041427

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-112-2
  • Executive Order 112-2 / D112-2
  • ARB # D-112-2
  • Executive Order No: D-112-2
  • C.A.R.B. No. D-112-2
  • Resolution D-112-2
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-112-2 PDF

D-112-2 Document:

Current View

Previous E.O. D-112-1 | Previous E.O. D-111 | Next E.O. D-112-3 | Next E.O. D-113