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

Introducing the next generation of Proven Performance for your 2018-2024 H-D® Softail® Models, the MK136B Engine . This is the newest version of the complete crate engines S&S is known for, ready to install in your M8 Softail. S&S took the MKB-Series Crankcases, married them to the 136" cylinders and flywheels, and then fit High-flow cylinder heads with +1mm Valves and .605" springs. This is everything you need to have the largest, most powerful, and most reliable crate engine on the market today.

• High-strength alloy used in cylinder head casting, improved strength at high temperatures


• High-flow cylinder heads with premium seats, guides, valves, springs, and seals


• Valves are .030" longer than stock for improved valvetrain geometry


• 1mm oversized intake and exhaust valves


• All premium quality components


• Sprocket shaft spacer included


• .605" max lift valve springs


• Billet aluminum covers