Approval Details

Valid E.O.


This Executive Order approved the specified parts on on May 24, 1999.
As of Tuesday, July 23rd, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1991-99 Acura NSX equipped with either the 3.0 or 3.2 liter engineThe NSX Supercharger Package includes the following major parts: Whipple 6 psi. supercharger with an intake assembly, 3.8" diameter supercharger pulley (applicable to the 3.2 liter engine), 4.2" diameter supercharger pulley (applicable to the 3.0 liter engine), crankshaft pulley (same diameter as stock), in line fuel pump, PROM chip for 1991-1994 models only, and all necessary installation hardware.The installation of the kit requires the following modifications to the stock vehicle: The stock crankshaft pulley is removed and replaced by an equal diameter pulley which is modified to accommodate the supercharger drive belt, the MAP sensor wire is modified with an in-line resistor for 1991-1994 models only, an in-line fuel pump is installed next to the fuel filter, the stock 15 amp fuel pump fuse is replaced with a 20 amp fuse, a resistor located on stock fuel pump is removed, and the stock intake manifold is removed and replaced with the combination supercharger and intake manifold configuration.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-455-4
  • Executive Order 455-4 / D455-4
  • ARB # D-455-4
  • Executive Order No: D-455-4
  • C.A.R.B. No. D-455-4
  • Resolution D-455-4
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-455-4 PDF

D-455-4 Document:

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