S&S Cycle High Output Super Stock Cylinder Head Kit For Harley Shovelhead Shovel stock appearance and improved performance with front and rear assembled cylinder heads complete with valves and .590 springs. The S&S Cycle High Output Super Stock Cylinder Head Kit comes complete with mounting hardware included. Enjoy high output performance and quality you can trust. Features: 3-5/8 bore Aluminum finish Shovelhead Big Twin with band style intake manifold and cams lifts up to .550 Fits stock intake manifolds and exhaust pipes Rocker cover fastened with 5/16-18 hex-head cap screws Complete front and rear assembled cylinder heads Mounting hardware and instructions included