Billet gear cover. Natural finish with black cylinders & a billet cam cover. The 93" Shovelhead engine with 3-5/8" bore and a moderate 4-1/2" stroke is and has been the most popular S&S Shovelhead Sidewinder engine for years. Engines come with forged big bore pistons, a Super E carburetor kit an S&S Super Stock ignition system and… a clear power advantage over the stock Shovel! Note: All S&S Shovelhead engines contain an Evolution style camshaft and tappets.