The EZ-EFI? GM LS Engine Transplant Kits allow anyone to easily run a GM LS Gen III/IV engine and transmission outside of the original vehicle and factory controller. These FAST? kits are the perfect no-headache solution for transplanting late model engines into street rods, muscle cars or other projects. Everything is covered, from fuel and spark to engine and electronic transmission. Optional package stages allow you to select the right level of kit based on your individual needs.