Tru-Power Engine Kit for 4-Cylinder 119.7 CID gas engine, 3-3/16 inch standard bore. Thin (.040 inch) wall sleeve. Engine overhaul kit contains .040 inch sleeves, 3-ring pistons, rings, pin & retainers, pin bushings, complete gasket set, intake & exhaust valves, valve springs & retainers, guides & retainers, valve keys,standard rod and main bearings. For 9N, 2N, 8N Tractors.