Approval Details

Valid E.O.


This Executive Order approved the specified parts on on February 22, 2011.
As of Sunday, February 25th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModels
Kingsway Hydrogen Fuel Enhanceme1985-2006 model year heavy-duty trucks equipped with diesel engines between 8.0 liters to 18.0 liters and 1985-2006 model year medium-duty trucks equipped with Cummins diesel engines between 5.9 liters to 8.0 liters.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-685
  • Executive Order 685 / D685
  • ARB # D-685
  • Executive Order No: D-685
  • C.A.R.B. No. D-685
  • Resolution D-685
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-685 PDF

D-685 Document:

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