S&S Cycle 2017+ M8 131in 4-5/8in Stroke Hot Set Up Kit - Wrinkle Black w/ Highlight
$2,695.95
The S&S Cycle 131" kit for 2017 and up M8 is the perfect sleeper package. Boost your engine displacement to get some big numbers at the rear wheel, without advertising it. The kit bolts in with no machine work required and keeps your bike looking stock for the "sleeper" approach. Our 131" kit includes all the necessary gaskets for the installation and if you want to tell everyone what you have, a new 131" badge is included for your cam cover.
- Huge displacement increase means huge power increase
- Original engine serial numbers are retained
- Powder coat finish matches factory finishes
- Includes 131" Cam Cover Badge
- Works with stock crankcases
- Retains stock engine height
- 4.250" bore, 4.625" stroke
- 11.0:1 compression ratio
- With headlight
Upgrade your 2017 and newer Harley-Davidson Milwaukee-Eight engine with the S&S Cycle 131-Inch Hot Set Up Kit, Part SSC320-0621. Designed as a sleeper-style performance package, this kit increases engine displacement for substantial rear-wheel power gains while preserving the motorcycle’s factory appearance. The wrinkle black finish with highlight complements original engine finishes, and the included 131-Inch cam cover badge lets you choose whether to keep the upgrade discreet or display it proudly.
The S&S Cycle 131-Inch kit is engineered to install using stock crankcases with no machine work required. It retains the original engine serial numbers and stock engine height, helping maintain a factory-like fit and appearance. The package includes the necessary gaskets for installation, providing key components needed to complete the engine upgrade. Its 4.250-inch bore and 4.625-inch stroke deliver increased displacement, while the 11.0:1 compression ratio supports the kit’s performance-oriented design.
This powersports engine kit is intended for compatible 2017 and newer Milwaukee-Eight applications and is designed for enthusiasts seeking stronger performance without an obvious external conversion. Verify application details, supporting components, tuning requirements, and local emissions regulations before installation. The kit is not CARB approved and may require acknowledgment of applicable emissions restrictions. Professional installation is recommended to ensure proper assembly, clearances, and engine calibration.
Features:
- Designed for 2017 and newer Milwaukee-Eight engines
- Provides a major displacement increase for greater power potential
- Installs with stock crankcases and requires no machine work
- Retains original engine serial numbers
- Maintains stock engine height
- Wrinkle black finish with highlight matches factory-style finishes
- Includes the necessary installation gaskets
- Includes a 131-Inch cam cover badge
- 4.250-inch bore and 4.625-inch stroke
- 11.0:1 compression ratio
- Not CARB approved