S&S Cycle #310-1296 - MK136 Engine - 475G Camshaft - Oil Cooled - M8 Softail

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 

Fitment