Approval Details

Valid E.O.


This Executive Order approved the specified parts on on May 21, 1992.
As of Saturday, February 24th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1962-1986 carbureted "small block" Chevy vehicles with 283, 302, 305, 307, 327, 350, or 400 CID engines

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-256
  • Executive Order 256 / D256
  • ARB # D-256
  • Executive Order No: D-256
  • C.A.R.B. No. D-256
  • Resolution D-256
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-256 PDF

D-256 Document:

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