Professionally built 2006 Ford Mustang aluminum 4.6 3 valve motor. Balanced and blueprinted with "Cobra forged pistons and steel rods". ARP Head studs complete the motor. Carroll Shelby "Paxton" polished supercharger. Motor has been dyno checked at over 500 hp. Ready for your hot rod project of choice. Can come with ECU and wiring harness. Includes all accessories started, alternator.