S&S Cycle 2018+ Oil Cooled M8 Softail Models MK136B Black Edition Engine w/ 475G Cam - 310-1296

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. We took our 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. 

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 valvetrain geometry 
• .605” max lift valve springs 
• High-strength alloy used in cylinder head casting, improved strength at high temperatures 
• S&S Exclusive breather boxes 

 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 

 MK136B 

• Forged pistons 
• S&S performance oil pump and cam support plate 
• 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