AI Quick Summary. FiTech's Ultimate Rebel LS EFI systems offer self-learning ECU for Gen III V-8s, available in 500, 750, and 1,000-hp models with customizable options.

FiTech has made LS engine swaps more affordable than ever. Complete Ultimate LS kits carry a price tag similar to a quality carburetor, manifold, and ignition system for a non-LS engine.

Thanks to FiTech and the array of retrofit fuel injection systems they offer it’s easy to toss that original mixer feed your Vette without carbs. Vette. See All 20 Photos. 1.

A hands-on dyno tuning session using a FiTech EFI system, packed with practical advice on throttle body adjustments, fuel maps, and optimizing engine performance.

350 crate motor owners rejoice! Now you can have performance EFI at a fraction of the cost with the FiTech Go Street EFI Throttle Body system.