Approval Details

Valid E.O.


This Executive Order approved the specified parts on on November 2, 1998.
As of Friday, May 24th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
800561988-1989 Honda Prelude SI 2.0LThe Flowtech AIRMASS Headers is a long tube style header manufactured out of 16 gage mild steel tubing with a blue or silver ceramic coating. Primary tube diameter is 1 5/8". The location of the oxygen sensor is at the collector, similar to the stock configuration. On vehicles were the existing oxygen sensor wire loom does not reach the new oxygen sensor location, Biggs Manufacturing will provide a wire loom extension that will plug into the factory connector

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-465
  • Executive Order 465 / D465
  • ARB # D-465
  • Executive Order No: D-465
  • C.A.R.B. No. D-465
  • Resolution D-465
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-465 PDF

D-465 Document:

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