S&amp,S Cycle S&S Cycle 80&Prime, Top End Kit 90-0098 Manufacturer Part No: 90-0098 S&amp;S now offers Shovelhead style top end kits that provide everything you need to replace the top end of a 80in. Shovelhead engine Kit includes a set of S&amp;S Shovelhead style cylinder heads, a set of S&amp;S stock bore cylinders (3-1/2in. for 80in.), S&amp;S cast 8:1 compression pistons complete with rings and wrist pins, manifold clamps, manifold seals, all required hardware and gaskets 4-1/4in. stroke pistons and rubber band style cylinder heads are also included Pistons are pre-fit to the cylinders, so there is no machine work done and very little down time