S&S MOTOR LONG BLOCK M8 MK136 BLACK EDITION

S&S MOTORS

Part Number : 310-1289

310-1289

Fitment

2017-2023 Harley-Davidson® M8 touring models (oil-cooled)

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

FITMENT INFORMATION

Fitment

2017-2023 Harley-Davidson® M8 touring models (oil-cooled).