The system uses the engine control module (ECM), body control module (BCM), electronic brake control module (EBCM), EFCM, exhaust flow control valve vacuum solenoid, vacuum reservoir, vacuum lines ...

Keep in mind, too, that all these heads can be fitted with larger 2.02/1.60-inch intake and exhaust valves, which would dramatically improve their flow potential.

The Trick Flow 4.6L Street/Strip heads were shipped to Fox Lake Power Products for a workout on its CNC machine. Fox Lake cleaned up the intake and exhaust ports, but left the Trick Flow valves in ...