The cylinders are made for the stock 69mm crankshaft and will fit 1300cc, 1500cc & 1600cc engines. Installing the 87mm pistons and cylinders will change the displacement to 1641cc. 1300 engines will need 1500 or 1600 heads to fit the larger cylinders. The 87mm piston and cylinders sets will fit 1966 through 1977 Standard Beetles, 1971 through 1979 Super Beetles, 1966 through 1974 Karmann Ghias, 1963 through 1971 Type 2 Bus Models, 1962 through 1973 Type 3 models and 1973 to 1974 Things. Piston Rings included.