Approval Details

Valid E.O.


This Executive Order approved the specified parts on on September 20, 1979.
As of Friday, June 21st, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
440-11979 and older HD vehicles with Chrysler 440 CID engines and M-400 or M-500 chassisKit includes turbocharger, exhaust manifold, water injection system, modified distributor, crossover pipe, and replacement muffler. Install 0.1 inch (primary) and 0.148 inch (secondary) jets on carburetor. Ignition timing set to 12-14 degrees before top dead center.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-90
  • Executive Order 90 / D90
  • ARB # D-90
  • Executive Order No: D-90
  • C.A.R.B. No. D-90
  • Resolution D-90
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-90 PDF

D-90 Document:

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