128" Power Package Engine Performance Kits / '17-'23 114"-117" M8 Motors

Upgrade your Harley Davidson M-Eight from a 114 / 117 engine to a commanding 128 powerhouse with the S&S Cycles 128 Power Packages. This big-bore bolt-on kit is meticulously designed for '17-Up models, offering a significant upgrade without the need for case machining. Heres a deep dive into the components and benefits of installing this power package Key Features: Bolt-On Convenience: Increases your M-Eight's displacement to 128" seamlessly, with a 4-1/4" bore and 11:1 forged pistons, enhancing performance dramatically. Enhanced Oil System: Features an S&S oil pump/cam plate with a blue anodized finish, independent scavenge sections for the flywheel cavity and cam chest, and a magnet in the cam chest to prevent debris from entering the oil pump. Optimized Oil Flow: The kit includes increased oil flow capacity on both the feed and scavenge sides, along with an adjustable pressure relief valve that can be tuned with the engine installed. Pushrod and Tappet Upgrades: Comes w