Approval Details

Valid E.O.


This Executive Order approved the specified parts on on December 31, 1997.
As of Tuesday, June 25th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
300421994-1996 GM Impala SS equipped with a 5.7L LT-1 dual catalytic converter gasoline engineIt is a direct replacement cast stainless steel exhaust manifold identical to the stock cast iron manifold. The oxygen sensor is located at the collector of each manifold. The new manifold bolts to all the stock General Motors components including the factory connecting pipes with no modifications required to any sensors.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-187-11
  • Executive Order 187-11 / D187-11
  • ARB # D-187-11
  • Executive Order No: D-187-11
  • C.A.R.B. No. D-187-11
  • Resolution D-187-11
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-187-11 PDF

D-187-11 Document:

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