The Terminator™ EFI 4-BBL Throttle Body Fuel Injection System is an EFI system so easy and powerful you’ll think it’s alive! Simply bolt it on, feed it a few basic answers, and let Terminator EFI take your ride to another level! The 550-406 fits all standard square-flange intake manifolds, has a 950-CFM throttle body, and is capable of supporting 250-600 HP. No computer experience required: this unit completely self tunes to deliver the perfect air/fuel mixture in real time for optimized power and fuel economy. The 550-406 comes complete with TBI unit, ECU, handheld programmer, wiring, and sensors. Does not include fuel pump, fuel lines, regulator or filters.