These FAST multi-port retro-fit EZ-EFI kits are self-tuning systems that don't require the use of a complicated laptop or EFI tuning experience. They include a self-tuning ECU, a wide band oxygen sensor, a hand-held user interface, a tach adapter, a multi-port wiring harness, and everything necessary for a quick and easy installation. Their built-in diagnostics and engine protection provide maximum engine safety, and the kits can run up to eight high-impedance fuel injectors to support various engine applications.