Ready to swap a GM LS or LT engine into your project vehicle but don't know how to drive the fuel and igntion? Problem solved! These kits connect directly to the existing sensors, ignition, and injectors and let you have your engine running as quickly as you plug everything up and answer a few question. Versions available with or without electronic transmission control (4L60E-4L80E transmissions only) and drive-by-wire. EFI has never been this easy!