Engine Long Block Short Block. 6 OEM DCEC PISTON RING Set FOR 5.9L 3.9L CUMMINS 4B ISB QSB B5.9 5.9L 4025012. 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.