Natural crankcases and stock-looking silver powder coated cylinders S&S Cycle hydraulic valve train with roller rocker arms S&S Cycle billet timer and S&S Super Stock single fire ignition system S&S Cycle forged pistons Super E carb, 585 cam, 8.5:1 compression Fits most 1970-99 Big Twin frames Evo style frames will require a custom made exhaust Shovel style frames can use standard shovelhead exhaust Requires 1970-up length main shaft Two year warranty S&S Cycle engines are shipped without oil Not legal for sale or use in California on any pollution controlled motor vehicles