Cutting-edge performance and 1930’s styling are ideal for your scale or sport aircraft. This new 4-stroke features a multi-cylinder design, deep bass sound and an angled valve layout with individual valve covers. Its cylinder head and crankcase are made of different material for optimum cooling and efficiency. This new powerplant uses the same the same bolt pattern as the O.S. FS-52 and 56FS-a, with a 180-degree reversible carburetor. It costs $299.99.