Approval Details

Valid E.O.


This Executive Order approved the specified parts on on August 31, 2007.
As of Tuesday, May 21st, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsRemarks
See Part Numbers in PDF file2007 to 2008 model year 5.4L Shelby GT500 and 2005 to 2006 model year Ford Supercharged GTThe Whipple Supercharger Kit, part numbers WIK-5.4L-4VGT and WIK-5.4L-4VGT500, is a replacement supercharger for vehicles originally equipped with a stock supercharger. The kit includes a twin screw Whipple, new open element air filter with intake air tubing, 105mm mass air flow sensor, and a new ECM calibration. Maximum boost produced by the supercharger is around 16 pounds per square inch. No changes are made to the stock throttlebody or radiator thermostat and installation would not require any modification to any fuel or emission related tubing. Supercharger is designed to be a direct bolt-on replacement to the stock supercharger. The Whipple Pulley Kits, part numbers WIK-5.4L-4VPGT and WIK-5.4L-4VPGT500, utilize the stock supercharger and include a different size supercharger pulley, 105mm mass air flow sensor, new ECM calibration, and a new open element air filter with intake air tubing. Boost is increased to around 16 pounds per square inch. The new ECM calibration and/or programmer for both kits does not have any emission related user adjustments nor does it have capability to allow the user to upload new fuel and timing maps.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-231-26
  • Executive Order 231-26 / D231-26
  • ARB # D-231-26
  • Executive Order No: D-231-26
  • C.A.R.B. No. D-231-26
  • Resolution D-231-26
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-231-26 PDF

D-231-26 Document:

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