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Upgrade your M8 engine with the S&S Cycle 132" Power Pack, designed to significantly increase displacement from the stock 114" or 117" configurations. This bolt-in kit features a 4.5-inch stroke, 4.32-inch bore cylinders, and forged pistons with an 11.0:1 compression ratio, delivering enhanced power and performance without the need for case machining. The package includes high-quality components such as an S&S oil pump and cam plate with a durable blue anodized finish, ensuring reliable oil flow and system longevity. Passage plugs are removable for easy servicing, and the independent scavenge sections for the flywheel cavity and cam chest help optimize oil circulation. Debris screens are incorporated into both scavenge pickups, and a magnet in the cam chest prevents debris from entering the oil pump, maintaining engine cleanliness and durability. The kit also offers increased oil flow capacity on both feed and scavenging sides, contributing to improved cooling and lubrication under demanding conditions. An adjustable pressure relief valve allows for fine-tuning oil pressure with the unit installed, providing flexibility for various riding styles. The included Quickee pushrods, premium S&S tappets, and hard-anodized, black-coated tappet cuffs made from billet aluminum ensure high-performance operation and durability. Designed specifically for big bore applications, the S&S 550 cams are matched with valve springs capable of handling up to 0.605-inch lift, utilizing a high-performance conical single wire spring design for stability and longevity. The kit also includes essential gaskets—exhaust, cylinder base, and head gaskets—to facilitate installation. Made in the USA, this power pack is an excellent choice for riders seeking to maximize their M8 engine's performance, though it is not compatible with 121" CVO models or trike configurations.
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