The next generation of Proven Performance for your 2018 & newer Milwaukee Eight powered Softail, the MK136B Engine.This is the newest complete and ready to install crate engine S&S is known for. S&S took their MKB-Series crankcases, married them to the 136" cylinders and flywheels, and then fit High-flow cylinder heads with +1mm valves and .605" springs.

Features & Benefits:
● High-flow cylinder heads with premium seats, guides, valves, springs, and seals
● +1mm oversized intake and exhaust valves, .030" longer than stock for improved valve-train geometry
● .605" max lift valve springs
● 136CI (2229CC)
● 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, performance oil pump, cam support plate, premium tappets and tappet cuffs
● Forged pistons
● Billet aluminum cam gear and rocker box covers
● S&S 475 or 550 Gear Driven camshaft
● 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
● Patented Dual-Spray Piston Cooling Jets
● Precision machined oil scraper
● Enlarged oil sump
● Contoured floor allows oil to easily drain back to the sump