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Upgrade your Harley-Davidson M8 engine with the S&S Cycle 132-inch Power Package, part number 310-1392, designed to deliver increased performance and reliability. This comprehensive kit boosts your engine's displacement from the stock 114"/117" with a 4.50" stroke to an impressive 132" without requiring case machining, making it a straightforward installation for experienced mechanics. The kit features a big bore 4.320" cylinder, paired with 11.0:1 forged pistons, ensuring durability and high compression for maximum power output. Built-in passage plugs are removable for easy servicing, and independent scavenge sections for the flywheel cavity and cam chest enhance oil flow and engine cooling. An integrated debris screen in both scavenge pickups and a magnet in the cam chest help prevent debris from entering critical oil passages, extending the lifespan of engine components. Increased oil flow capacity on both feed and scavenge sides improves lubrication efficiency, supporting high-performance operation. The adjustable pressure relief valve allows fine-tuning of oil pressure while the engine is running, ensuring optimal performance under various conditions. The kit includes Quickee pushrods with pushrod tubes and S&S premium tappets, along with black-coated, billet aluminum tappet cuffs for durability. S&S valve springs are compatible with cams up to 0.605" lift and feature a high-performance conical single wire spring design, providing reliable valve operation. The HPT496 cam, specifically designed for big bore applications, optimizes power delivery and torque. Multi-layered steel (MLS) head gaskets ensure proper sealing and performance. The package also contains a 132" cam cover badge, and all components are made in the USA, maintaining the original engine serial numbers and factory engine height. This kit works seamlessly with stock crankcases, stock valve springs (both first and second generation), and S&S roller rocker arms, making it a versatile upgrade for your Harley-Davidson M8 engine. Whether you're aiming for increased horsepower or improved engine longevity, this power package offers a comprehensive solution for serious performance enthusiasts.
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