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Upgrade your Harley-Davidson M8 engine with the S&S Cycle 129" Power Pack, designed for exceptional performance and reliable operation. This kit transforms your 107-inch M8 into a powerful 129-inch beast with a simple bolt-on installation that requires no case machining. Featuring 4.32-inch bore cylinders and forged pistons with an 11.0:1 compression ratio, this upgrade delivers increased power and efficiency. The kit includes a high-performance S&S oil pump and cam plate with a distinctive blue anodized finish, ensuring durability and improved oil flow. Passage plugs are removable for easy servicing, and independent scavenge sections for the flywheel cavity and cam chest help optimize oil circulation. Debris screens in both scavenge pickups and a magnet in the cam chest work together to prevent debris from entering the oil pump, enhancing engine longevity. The increased oil flow capacity on both feed and scavenge sides supports the demands of high-performance applications. The adjustable pressure relief valve allows precise tuning when the unit is installed in your engine. Quickee pushrods, premium S&S tappets, and hard-anodized, black-coated tappet cuffs constructed from billet aluminum ensure smooth operation and long-lasting durability. The included S&S 550 cams are specifically designed for big bore applications and work seamlessly with valve springs up to 0.605 inches lift, utilizing a high-performance conical single wire spring design. All necessary gaskets, bearings, and hardware are included for a straightforward bolt-on installation. Crafted in the USA, this power pack is built to deliver increased horsepower and enhanced throttle response. Please note, this kit is not compatible with Trike models, but it offers a comprehensive upgrade for those seeking maximum performance from their M8 engine.
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US Dollars
