Crankcase set for Panhead engines comes ready to assemble. S&S Crankcase Sets are shipped set up with Timken left side bearing and race assembly seal and seal spacer oil pump drive bushing needle bearing and pinion race for right side is pressed in and line honed ready to assemble. Also included are cylinder studs nickel plated case bolts crankcase fittings and a timing and magnetic drain plug. Engine crankcase features stock bore and accepts flywheels up to 8 inch diameter. Manufacturer's Statement of Origin is supplied. Tech Notes: Order #12-8001 oil pump required for assembly FITS Harley Davidson FL 1948 Harley Davidson FL 1949 Harley Davidson FL 1950 Harley Davidson FL 1951 Harley Davidson FL 1952 Harley Davidson FL 1953 Harley Davidson FL 1954 Harley Davidson FL 1955 Harley Davidson FL 1956 Harley Davidson FL 1957 Harley Davidson FL 1958 Harley Davidson FL 1959 Harley Davidson FL 1960 Harley Davidson FL 1961 Harley Davidson FL 1962 Harley Davidson FL 1963 Harley Davidson FL 1964