S&S Cycle MK136 Black Edition Engine With 550 G Cam For Harley Oil-Cooled Touring 2017-2025

S&S Cycle MK136 Black Edition Engine With 550 G Cam For Harley

This is everything you need to have the largest, most powerful, and most reliable crate engine on the market today. Introducing the next generation of Proven Performance for your 2017 & newer H-D Touring Models, the MK136 Engine. This is the newest version of the complete crate engines S&S is known for, ready to install in your M8 Touring bike. We took our MK-Series Crankcases, married them to the 136” cylinders and flywheels, and then fit High-flow cylinder heads with +1mm Valves and .605" springs. Huge displacement increase means a huge power increase!

Features:

• High-flow cylinder heads with premium seats, guides, valves, springs, and seals
• +1mm oversized intake and exhaust valves
• Valves are .030" longer than stock for improved valvetrain geometry
• .605" max lift valve springs
• High-strength alloy used in cylinder head casting, improved strength at high temperatures
• Enlarged cooling passage around the exhaust seats
• S&S Exclusive breather boxes
• Patented Dual-Spray Piston Cooling Jets
• O-ring sealing between case and cam support plate
• Precision machined oil scraper
• Enlarged oil sump
• Contoured crankcase floor allows oil to easily drain back to the sump
• Forged pistons
• S&S performance oil pump and cam support plate
• Premium tappets and tappet cuffs
• Billet aluminum covers
• Sprocket shaft spacer included
• Retains stock engine height
• Powder coat finish matches factory finish