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 in. cylinders and flywheels, and then fit High-flow cylinder heads with +1mm Valves and .605 in. springs. This is everything you need to have the largest, most powerful, and most reliable crate engine on the market today.
