Free Shipping.

Expert Service.

S&S MK Series Crankcase Assembly

Item: 420248

$2849.95

Add to Cart to See Price

What is this? We've priced this item below what the manufacturer allows for public display, so you'll have to add it to your cart to view our final price.

Don't worry, if you decide not to buy this item, you can easily remove it from your cart.

Select Your Vehicle - Fitment Guaranteed

S&S MK Series Crankcase Assembly


  • Stock deck height
  • Machined, close-fitting oil scraper (stock is as cast)
  • Large volume sump
  • Machined oil scraper allows for better oil scavenging which results in lower oil temperatures in the flywheel cavity
  • Can be paired with a S&S 136" cylinder kit and 4-5/8" stroker crank (sold separately)
  • Reinforced case prevents cracking in high stress areas for increased reliability
  • Allows for installation of larger bore kits, scrapes more oil, and offers reliability while fitting into stock Softail frame
  • Made in the USA
Specification Details
Country of Origin USA
Engine Type Milwaukee Eight
Warranty 1 Year Manufacturer Warranty

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Harley Davidson
  • FLDE Softail Deluxe 2018-2020
  • FLFB Softail Fat Boy 2018-2019, 2025
  • FLFBS Softail Fat Boy 114 2018-2024
  • FLHC Softail Heritage Classic 2018-2021, 2025
  • FLHCS Softail Heritage Classic 114 2018-2024
  • FLSB Softail Sport Glide 2018-2021
  • FLSL Softail Slim 2018-2021
  • FXBB Softail Street Bob 2018-2020, 2025
  • FXBBS Softail Street Bob 114 2021-2024
  • FXBR Softail Breakout 2018-2019, 2023-2025
  • FXBRS Softail Breakout 114 2018-2020
  • FXDR Softail 114 2019-2020
  • FXFB Softail Fat Bob 2018-2019
  • FXFBS Softail Fat Bob 114 2018-2023
  • FXLR Softail Low Rider 2018-2020
  • FXLRS Softail Low Rider S 2020-2025
  • FXLRST Softail Low Rider ST 2022-2025
  • FXST Softail Standard 2020-2024

Customer Reviews


Be the first to review this product. How many stars would you give this product?

Questions & Answers


Have a question? Please ask our experts and customers who own this product.