Approval Details

Valid E.O.


This Executive Order approved the specified parts on on March 10, 2006.
As of Tuesday, May 21st, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

2005 and 2006 model year Ford Mustangs equipped with a 4.6L engineThe Ford Performance/Ultimate Normally Aspirated Package includes shorty exhaust headers manufactured out of 16 gage stainless steel, 4:10 gear set, open element air filter, charge motion delete plate (optional), and a ECU programmer with no user adjustments.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-598
  • Executive Order 598 / D598
  • ARB # D-598
  • Executive Order No: D-598
  • C.A.R.B. No. D-598
  • Resolution D-598
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-598 PDF

D-598 Document:

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