S&S Cycle MK-Series Engine Crankcase Assembly For Harley M8 Touring The M8 mill is a great starting point for a high-performance build. The factory did a heck of a job, but eventually you will reach the operating limits of a stock bottom end. S&S saw where the market was going and developed the MK-Series Crankcase assembly. These high quality cases are designed specifically to accommodate larger bores, scrape more oil, and offer more reliability, all while fitting in a stock touring frame. If you are looking to push the boundaries of performance, start off with a set of high strength cases that you know are up for the task! Features: Stock deck height Large volume sump Fits stock touring frame Designed to accept larger bores Accepts all OEM style components Reinforced case prevents cracking in high stress areas for increased reliability Machined oil scraper allows better oil scavenging which result in lower oil temperatures in the flywheel cavity Made in the USA