Approval Details

Valid E.O.


This Executive Order approved the specified parts on on April 24, 2008.
As of Sunday, April 14th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
See PDF1997 through 2008 Ford trucks and motorhomes w/ a 4.6/5.4/6.8L engine and 1991 to 2008 Jeep WranglersThe TorqueTubes are shorty style headers, manufactured out of 16 gauge stainless steel tubing. For all applications, excluding motorhomes, the oxygen sensor is retained in the stock location and at a collector. Motorhome applications may include a connecting Y-pipe that is also manufactured out of 16 gauge stainless steel tubing. The oxygen sensor is in the connecting Y-pipe at a collector, similar to stock.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-161-78
  • Executive Order 161-78 / D161-78
  • ARB # D-161-78
  • Executive Order No: D-161-78
  • C.A.R.B. No. D-161-78
  • Resolution D-161-78
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-161-78 PDF

D-161-78 Document:

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