S&S Cycle 1250CC Conversion Kit - 10.3:1 Compression - Black 910-0691Forged 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. NOTE: 883 models will require the use of XL1200