Sleeve & Piston Kit for the late 400, 700 730 770 800 late 900 930 & 970 Gas Tractors. These engines have an upper sleeve flange dia. of 4.997 (5″). This kit will be an upgrade from the stock 4″ to 4-1/8″. Piston height is also slightly taller resulting in a boost in compression. Included is the 4-1/8″ Sleeve, Sleeve O rings, Piston, Pin & Piston Rings. Priced each hole.