Approval Details

Valid E.O.


This Executive Order approved the specified parts on on June 30, 2011.
As of Monday, September 28th, 2020 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModels
55420 SpeedBrake2004-2005 GM 6.6L

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-161-91
  • Executive Order 161-91 / D161-91
  • ARB # D-161-91
  • Executive Order No: D-161-91
  • C.A.R.B. No. D-161-91
  • Resolution D-161-91
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-161-91 PDF

D-161-91 Document:

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