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

Elevate your M8 H-D Touring model with the MK136 Engine, marking the latest advancement in S&S's renowned line of complete crate engines. Engineered for unmatched power and reliability, the MK136 combines S&S MK-Series Crankcases with 136” cylinders and flywheels, enhanced by High-flow cylinder heads featuring +1mm Valves and .605" springs. This fusion not only amplifies displacement but significantly boosts power, setting a new benchmark in engine performance.

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