S&S Cycle 2018+ Oil Cooled M8 Softail Models MK136B Black Edition Engine w/ 475G Cam

This is the S&S Cycle MK136B Black Edition Engine, a complete crate engine built for 2018 and newer Harley-Davidson M8 Softail models with oil-cooled engines. It's designed to be a direct replacement, giving you the largest, most powerful, and most reliable engine S&S offers for this platform. If you're looking to significantly upgrade your motorcycle's performance and capability, this engine is engineered to deliver.

At its heart, this engine uses S&S's MKB-Series crankcases paired with 136 cubic inch cylinders and flywheels. The cylinder heads are a significant upgrade, featuring high-flow designs with 1mm oversized intake and exhaust valves, plus longer valves that improve valvetrain geometry. These heads are cast from a high-strength alloy that holds up better under high temperatures, and they come equipped with premium seats, guides, valves, and .605 inch max lift springs. The engine also includes a 475G cam and billet aluminum covers for a clean, finished look. Everything you need for a substantial performance increase is included, right down to the sprocket shaft spacer.

This engine is a serious performance upgrade for your M8 Softail. It's built with premium components throughout, aiming for both maximum power and long-term reliability. Please note that this engine is not CARB approved and cannot be shipped to California.