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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