Approval Details

Valid E.O.


This Executive Order approved the specified parts on on May 10, 2000.
As of Tuesday, April 23rd, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1988 through 1999 Honda Motor Company vehicles equipped with either a 1.5, 1.6, or 1.8 liter engine, excluding any vehicle originally equipped with a close coupled catalyst or certified to any low emission vehicle standards.The 4-1 Honda Extractor is a long tube style header manufactured out of 16 gage mild steel tubing. The location of the oxygen sensor is at the collector, similar to the stock configuration. On vehicles where the existing oxygen sensor wire loom does not reach the new oxygen sensor location, Tri-Mil Industries, Inc. 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-497
  • Executive Order 497 / D497
  • ARB # D-497
  • Executive Order No: D-497
  • C.A.R.B. No. D-497
  • Resolution D-497
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-497 PDF

D-497 Document:

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