Typically when you add more camshaft or compression to your engine, the stock computer can not make the adjustments needed for proper performance.  The Holley Commander 950 Engine management kits provide a state-of-the-art electronic control
module as a computer upgrade for specific applications when the stock computer can no longer support your modifications or for retro-fitting an EFI engine into another vehicle.  The Holley Engine Management System kits contain the Commander 950 ECU, wiring harness and sensors, where applicable, that you’ll need to make a customized fuel injection installation.

These systems are designed only for fuel and spark management.  Items such as cruise control, transmission control, AC, ABS, etc. are not controlled by the Commander 950.