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S&S Cycle MK136 Black Edition Race Only Engines 310-1295
Part Number: SSY-310-1295
S&S Cycle MK136 Black Edition Race Only Engines
2018+ Oil Cooled M8 Softail Models MK136B Black Edition Engine w/ 550G Cam
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Estimated Ship Date: Dec 14, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
310-1295
Part Type:
Product Line:
Summit Racing Part Number:
SSY-310-1295
Assembled:
Yes
Powersports Engine Family:
Milwaukee 8
Powersports Engine CID:
136
Engine Color:
Black wrinkle
Cylinder Heads Included:
Yes
Intake Manifold Included:
No
Carburetor Included:
No
Throttle Body Included:
No
Air Cleaner Included:
No
Rocker Box Cover Included:
Yes
Rocker Box Finish:
Black powdercoated
Spark Plugs Included:
Yes
Spark Plug Wires Included:
No
Ignition Included:
No
Computer Included:
No
Quantity:
Sold individually.
Notes:
Engine features a 4.320 in. bore, 4.625 in. stroke, S&S 550 gear drive cam, and fits oil-cooled models.
S&S Cycle MK136 Black Edition Race Only Engines
S&S Cycle MK136 Black Edition race-only engines are high performance 136 cu. in. complete crate engines for 2018-and-up Harley-Davidson M8 Softail models. They feature a blacked-out finish, 550G gear drive cam, high-flow heads, and forged pistons—designed for maximum performance in closed-course competition.
Key details:
* Performance: Delivers massive power, designed for racing applications
* Engine specs: 136 cu. in., 11:1 compression ratio, 4.320 in. bore and 4.625 in. stroke
* Camshaft: Equipped with the 550G gear drive cam for precise timing
* Valvetrain: High-flow cylinder heads, +1mm oversized valves, and 0.605 in. lift valve springs
* Durability and cooling: Features patented Dual-Spray piston cooling jets, an enlarged oil sump, and improved cooling passages for the exhaust seats
* Fitment: Ideal for 2018–24 Softails (oil-cooled), maintaining stock engine height for easy installation
* Important notes:
-- Not street legal: Intended for closed-course racing only
-- Finish: Gloss black powder coat to match OEM Harley-Davidson styling
* Contents: Complete assembly with S&S performance oil pump, cam support plate, and premium tappets
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