Engine Long Block Short Block. Fuel injector copper sleeve disassembly tool for cummins NT855/M11 Tap type. I will listen to good opinions, Try to produce high efficiency, high strength, and light weight as much as possible, Convenient maintenance tools for maintenance technicians who work very hard and sweat hard every day, To reduce their labor force, thank you to all the maintenance technicians first. The count starts from the day after you placed your order and excludes weekends and holidays. We are subject to labor law regulations that restrict weekend sales services. All the warrantee Are Limited in Parts Only, engine rotation is very Danger, to be safe when the engine running all the people must keep distance at least 10 feet away from engine rotation radius, any time the shut down valve must be active, keep your engine can be stop any time.