S&S Cycle MK136 Black Edition Engine with 550G Cam for ’17-23 Harley-Davidson M8 Touring Models (oil-cooled) Race Only

Features & Benefits

Cylinder Heads

• 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 valve-train 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

MK136

• Forged pistons
• S&S performance oil pump and cam support plateP
• Premium tappets and tappet cuffs
• Billet aluminum covers • Sprocket shaft spacer included
• Champion spark plugs • Retains stock engine height
• Includes Cam Cover Badge
• Powder coat finish matches factory finish
• Huge displacement increase means a huge power increase

Crankcase

• All premium quality components
• Patented Dual-Spray Piston Cooling Jets
• Precision machined oil scraper
• Enlarged oil sump
• Contoured floor allows oil to easily drain back to the sump