S&S Cycle 1250cc Conversion Kit - Compression 10.3:1 - Silver 910-0433 Forged pistonscoated piston skirts with measurement window and S & S logo Forged pistons have larger then stock valve pockets and accepts up to 2.00in. valves Available in silver powder coat or wrinkle black powder coat finish Kit includes S & S 1250cc pistons with rings and wristpins, S & S 3 9/16in. bore cylinders, MLS head, base and exhaust gaskets, assembly lube and instructions Made in the U.S.A.