Approval Details

Valid E.O.


This Executive Order approved the specified parts on on September 22, 2014.
As of Sunday, April 14th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
21-735WR2015 2.5 liter turbocharged Subaru WRX STIThe resonator diaphragm is plugged in the modification.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-670-18
  • Executive Order 670-18 / D670-18
  • ARB # D-670-18
  • Executive Order No: D-670-18
  • C.A.R.B. No. D-670-18
  • Resolution D-670-18
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-670-18 PDF

D-670-18 Document:

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