Engines and Components› Engines, Blocks and Components

S&S Cycle

S&S Cycle 2017+ M8 Touring 4.5in Bore MK-Series Crankcase Assembly

$2,499.95

SKU: S0GE 310-1341

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Description

The S&S Cycle MK-Series 4-1/2" Bore Engine Crankcase Assembly (MPN 310-1341) is designed for high-performance Harley-Davidson Milwaukee-Eight (M8) engines. It accommodates cylinders up to 4 1/2" bore, features a machined oil scraper, and a large volume sump for improved oil management. This crankcase assembly fits Harley-Davidson Touring models from 2017-2025, including Electra Glide, Street Glide, Road Glide, Road King, and Ultra Limited.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandS&S Cycle
Part NumberS0GE 310-1341

Videos

Stock VS Built | M8 Flywheel Comparison 2020 with Moonshine H-D | Shop Talk Episode 46

Stock VS Built | M8 Flywheel Comparison 2020 with Moonshine H-D | Shop Talk Episode 46

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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