The Ultimate LS EFI System Kit is a complete self-tuning induction system for LS engines, designed for everyone from the do-it-yourself hot rodder to the professional EFI tuner! This system is ready to go with everything needed to complete the induction system of your LS engine and to get you on the road easier and faster than any system on the market today. Forget sourcing mismatched parts, cutting and splicing old harnesses, and re-flashed ECU’s from “Craigs List†tuners. FiTech’s Ultimate Series EFI is a complete kit suitable for a junkyard 5.3 to a stroker 427. It’s never been so simple to ditch that old factory hardware or to top off that fresh long block because FiTech has taken the work out of getting your new or pull-out LS up and running.