Black. A 4-1/2" large bore crankcase assembly version (4.695" spigot bore) of the S&S 701028 Standard bore MK-Series cases. Ready for even bigger bores to install truly massive cylinders! All that big bore power requires a quality and strength past what stock cases can take. That is where this large bore S&S Softail M8 crankcases come in. Designed to allow for extra large bores; with a machined oil scraper for less oil dragging on the flywheels. Offered is better reliability; all while fitting in a stock frame. - Stock deck height - Fits stock frame - Stronger than stock - Machined; close-fitting oil scraper (stock is as cast) - Large volume sump - 4-1/2" bore (4.695"spigot bore)