S&S Cycle SS310-1170 Crankcase Assembly Black for Touring 17-UpThe demand for performance based bagger parts is growing, and these M8 engines are creating more power daily. All that power requires a quality base that the stock cases can't provide. That's where the new S&S M8 Crankcases come in! Designed to allow for larger bores, scrape more oil, and offer more reliability, all while fitting in a stock touring frame.