Approval Details

Valid E.O.


This Executive Order approved the specified parts on on September 23, 2008.
As of Sunday, July 21st, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsRemarks
309-370 & 309-3732001 to 2006 model year Harley Davidson motorcycles, which are not equipped with oxygen sensorThe Thunder Max includes the following main components: Replacement ECU, two Bosch heated oxygen sensors, and a sensor control module. Each oxygen sensor is installed in the head pipe 4 to 6 inches from the cylinder head, similar in location and orientation as the late-model Harley Davidson motorcycles equipped with oxygen sensors. User adjustments on ECU can only be made on non-emission related parameters, and on air/fuel ratio and spark settings at high throttle conditions only. The Thunder Max is designed to replace the stock open loop fuel controller with a feedback controlled fueling system using the stock fuel injectors

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-644
  • Executive Order 644 / D644
  • ARB # D-644
  • Executive Order No: D-644
  • C.A.R.B. No. D-644
  • Resolution D-644
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-644 PDF

D-644 Document:

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