Approval Details

Valid E.O.


This Executive Order approved the specified parts on on July 24, 2001.
As of Tuesday, May 21st, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1987 through 1992 Ford trucks equipped with a 4.0L fuel injected engineThe Ranger Intake Kit includes a K&N style open element air filter designed to replace the stock air filter box.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-521
  • Executive Order 521 / D521
  • ARB # D-521
  • Executive Order No: D-521
  • C.A.R.B. No. D-521
  • Resolution D-521
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-521 PDF

D-521 Document:

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