Kit includes: piston, rod, cylinder and o-ring. Note: Bearing screw must be torqued to 40-50 in. lbs. No compression usually means a worn piston and cylinder. (Make sure your valves are not broken by inspecting the valve plate as well.) A 30 minute repair well worth the time and money. We machine the rod for better fit. Part has 048-0088 marked on the rod. When installing, Slide piston down into cylinder. Failing to do this will damage the piston ring.