FAST XFI Fuel Injector Harnesses connect the XFI ECU to the fuel injectors. These harnesses are designed to accommodate most common V8 engines from the Chevrolet Small Block to GM LS Series, Ford Small and Big Blocks as well as Windsor, Modular, FE configurations. FAST also has taken the initiative to help out customers with less common applications such as Buick V6, Modern Chrysler and even 4 cylinder applications. And, while we may not have a custom tailored injector harness that fits your needs, all of our harnesses can be re-pinned for custom firing orders and re-terminated to accommodate different injector connectors. XFI Fuel Injection Harness equipped with USCAR/EV6 connections and a harness designed to fit Chrysler Modern 5.7L/6.1L/6.4L Hemi and other V8 engines with a 1-8-4-3-6-5-7-2 firing order. This fuel injector harness features 8 USCAR/EV6 style connections with a pre-terminated ECU connection. ; Connects XFI ECU to Injectors on Chrysler Modern 5.7L/6.1L/6.4L Hemi Engines as well as other V8 engines that have an USCAR/EV6 style injector with a 1-8-4-3-6-5-7-2 firing order.