Approval Details

Valid E.O.


This Executive Order approved the specified parts on on July 26, 1999.
As of Sunday, July 14th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

2000 model-year and older General Motors trucks equipped with the 7.4L engineThe 7.4L Cylinder Heads are designed to directly replace the stock set of cylinder heads and are manufactured out of aluminum. The Cylinder Heads include two fully assembled cylinder heads, two sets of rocker arms, a complete set of pushrods, and two valve covers. No modifications are made to the vehicle's computer or fuel delivery system

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-481-1
  • Executive Order 481-1 / D481-1
  • ARB # D-481-1
  • Executive Order No: D-481-1
  • C.A.R.B. No. D-481-1
  • Resolution D-481-1
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-481-1 PDF

D-481-1 Document:

Current View

Previous E.O. D-481 | Previous E.O. D-480 | Next E.O. D-481-2 | Next E.O. D-482