ACDelco 12575055 GM Original Equipment Multi-Port Fuel Injector Rail Kit with Rails, Valves, and Caps GM-recommended replacement part for your GM vehicles original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function Features premium quality components Substandard cores are discarded Engineered to high standards Assured high quality and dependability Tested under extreme conditions