Approval Details

Valid E.O.


This Executive Order approved the specified parts on on October 27, 1997.
As of Monday, April 15th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
8511181988-1995 GM trucks 5.7L w/o air injectionThe Shorty Headers are direct replacement exhaust headers manufactured out of 16 gage mild steel. The installation of the header utilizes the use of the stock connecting pipes and does not require the relocation of any sensor.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-439
  • Executive Order 439 / D439
  • ARB # D-439
  • Executive Order No: D-439
  • C.A.R.B. No. D-439
  • Resolution D-439
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-439 PDF

D-439 Document:

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