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!
| Product Style | J&P Cycles Item # | Catalog Number | Store Sku | MFR. Product # | Availability |
|---|---|---|---|---|---|
| Product Style Black | J&P Cycles Item #10384325 | Catalog Number10384325 | Store Sku | MFR. Product #310-1170 | AvailabilityIn Stock: Ships within 24 hours |
150-Horsepower Harley-Davidson | J&P: Custom Motorcycle Builds
124 Cubic Inch Twin Cam FXR | J&P: Custom Motorcycle Builds
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