New to Powersport Superstore? Try our Year-Make-Model search and find the right parts for your ride by clicking "My Garage" on the upper-right! ➡

S&S Cycle 310-1170 MK Series Engine Case

SKU: 8677464

S&S Cycle 310-1170 MK Series Engine Case

S&S Cycle
$2,499.95
$2,499.95
Sale Sold out
/
Shipping calculated at checkout.
In stock and ready for shipping
This is a pre order item. We will ship it when it comes in stock.
Aluminum construction. Reinforced case prevents cracking in high-stress areas for improve reliability. Machined oil scraper allows better oil scavenging; which results in lower temperatures in the flywheel cavity. Designed to fit into the stock frame. Stock deck height. Large volume sump. Accepts all OEM-style components. Can accept larger bores than stock. Includes crankcase assembly, main bearings (2), balancer shaft bearings (2), inner cam bearing, cylinder studs (8), magnetic drain plug, 1/4in. pipe plugs (4), front and rear piston cooling jets and gaskets, and all necessary hardware, O-rings and seals for assembly.

Vehicle Fitment:

2023 Harley Davidson FLHFB Electra Glide Highway King
2017-2023 Harley Davidson FLHRXS Road King Special
2017-2023 Harley Davidson FLHTK Ultra Limited
2017-2023 Harley Davidson FLHX Street Glide
2017-2023 Harley Davidson FLHXS Street Glide Special
2022-2023 Harley Davidson FLHXST Street Glide ST
2020-2023 Harley Davidson FLTRK Road Glide Limited
2017-2023 Harley Davidson FLTRX Road Glide
2017-2023 Harley Davidson FLTRXS Road Glide Special
2022-2023 Harley Davidson FLTRXST Road Glide ST
2017-2022 Harley Davidson XL1200X Forty-Eight
2018-2019 Harley Davidson XL1200XS Forty-Eight Special
Secure, Trusted, and Encrypted

Protected by industry-leading 256-bit SSL encryption and backed by Shopify’s PCI DSS–compliant infrastructure. Every page, click, and transaction is encrypted and monitored for threats — so you can shop with confidence knowing your data stays protected.

Parts for Every Machine

We stock aftermarket parts, gear and accessories for motorcycles, ATVs, UTVs, snowmobiles, personal watercraft, and even performance cars — all backed by expert support and live inventory.

Real-Time Fitment Accuracy

Search by Year, Make, and Model with confidence. Our proprietary vehicle fitment system ensures you’re only shown what fits — no guesswork, no returns — just parts that fit.

Fast, Trackable Shipping

We ship from over 20 U.S. warehouses — often same or next business day. Every order includes tracking and transparent fulfillment updates from start to finish, all processed through a secure, encrypted checkout.

Quick Links

Ride With Us. Stay Connected.

Follow us for real-time fitment updates, gear drops, and pro tips from the garage. No spam, just parts, tech, and news for riders like you.

Your Garage

Add a Vehicle