ATK has teamed up with FITECH EFI for our Complete Engine Packages with EFI (Electronic Fuel Injection). Our complete engine is designed for those that are wanting to drop the engine into their project and fire it up with the latest EFI system. We try to outfit the engine as completely as possible to save you time and headaches. A GM Complete Dress engine typically consists of the Stage 2 build out plus the following: EFI, Spark Plug Wires, Spark Plugs and a Dyno Test/Tune.