Approval Details

Valid E.O.


This Executive Order approved the specified parts on on August 15, 2008.
As of Wednesday, May 22nd, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
See PDF1999 and older vehicles, See PDFThe Summit Industries, Inc.ÔÇÖs Thorley Headers are of a long tube style design. Installation may require the use of a connecting Y pipe. Both the exhaust header and Y pipe are manufactured out of 14 gage mild steel. On vehicles that are equipped with an oxygen sensor, the sensor is located either on the headerÔÇÖs collector or at the top of the Y pipe similar to the vehicles stock configuration.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-540-5
  • Executive Order 540-5 / D540-5
  • ARB # D-540-5
  • Executive Order No: D-540-5
  • C.A.R.B. No. D-540-5
  • Resolution D-540-5
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-540-5 PDF

D-540-5 Document:

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