S&S MK136 Engine - 550G Camshaft - Oil Cooled - M8 Softail

The S&S MK136 Engine delivers a big jump in displacement and power with matched S&S components.

Fits 2018-2024 Harley-Davidson Softail models. Check the fitment chart below to confirm your exact year and model.

• Massive 136 cubic inch complete crate engine built on premium MKB-Series crankcases

Cylinder Heads:

• High-flow cylinder heads with premium seats, guides, valves, springs, and seals
• +1.00 mm oversized intake and exhaust valves
• Valves are 0.030" longer than stock for improved valvetrain geometry
• 0.605" max lift valve springs
• High-strength alloy used in cylinder head casting, and provides improved strength at high temperatures
• S&S exclusive breather boxes

Crankcase:

• 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
• Made in the USA