Approval Details

Valid E.O.


This Executive Order approved the specified parts on on June 16, 1999.
As of Wednesday, June 19th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1999 General Motors trucks equipped with a 4.8, 5.3, or 6.0 liter engineThe 2000 Series Headers is a pair of long tube style headers and a connecting Y pipe manufactured out of 14 gage coated mild steel tubing. The location of the oxygen sensor is at the collector in the connecting pipe, similar to the stock configuration.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-484
  • Executive Order 484 / D484
  • ARB # D-484
  • Executive Order No: D-484
  • C.A.R.B. No. D-484
  • Resolution D-484
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-484 PDF

D-484 Document:

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