Approval Details

Valid E.O.


This Executive Order approved the specified parts on on October 27, 2004.
As of Tuesday, July 23rd, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

2005 and older General Motors trucks excluding the following engine test groups; 2004 model year, 4GMXT04.2185, 4GMXA06.0189; 2005 model year, 5GMXT04.2185, and 5GMXA06.0189The WhippleCharger is a supercharger consisting of the following main components: Twin Screw Whipple supercharger, two auxiliary fuel injectors with a stand alone computer, air bypass valve, a low temperature thermostat to replace stock thermostat, and a new closed element air cleaner housing. An intercooler is included on selected kits and denoted as IC in the part number. The maximum boost is 10 psi.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-231-22
  • Executive Order 231-22 / D231-22
  • ARB # D-231-22
  • Executive Order No: D-231-22
  • C.A.R.B. No. D-231-22
  • Resolution D-231-22
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-231-22 PDF

D-231-22 Document:

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