S&S Cycle Power Pack for M8 4.375-inch Stroke with Oil Cooled System - Black Granite Finish (Part Number 310-1057C)

Product type: Big Bore Kits

SKU : 0904-0135

Regular price $3,294.95 USD

Lease to own Pay as low as $/week

Power Pack - 4.375" Stroke - Oil Cooled - Black Granite w/Highlights - M8 Enhance your Harley-Davidson M8 engine with the S&S...

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Power Pack - 4.375" Stroke - Oil Cooled - Black Granite w/Highlights - M8

Enhance your Harley-Davidson M8 engine with the S&S Cycle Power Pack, designed to deliver increased performance and durability. This bolt-on kit features a 4.375-inch stroke and includes high-quality components such as forged pistons and a precision-machined billet aluminum oil pump and cam plate. The kit's oil pump and cam plate incorporate removable passage plugs for easy servicing, along with independent scavenge sections for the flywheel cavity and camchest that improve oil flow and system reliability. Debris screens in both scavenge pickups and a magnet in the camchest help prevent contaminants from entering the oil pump, ensuring cleaner oil circulation and extended engine life. The Power Pack boasts a 44% increase in supply side flow and a 58% increase on the scavenge side, contributing to enhanced lubrication and cooling under demanding conditions. The pressure relief valve is adjustable with the unit installed, allowing fine-tuning for optimal performance. The kit also includes Quickee pushrods for faster installation and maintenance, along with hand-assembled tappets held to exact tolerances to minimize valve train noise from startup to shutdown. The hard anodized black coating with highlights not only provides a sleek appearance but also adds corrosion resistance. Constructed from billet aluminum, the tappet cuffs offer superior stability during high lift and high RPM operation, maintaining consistent valve timing and reducing wear. Designed for easy bolt-on installation without case machining, this Power Pack is ideal for riders seeking reliable performance upgrades that combine advanced engineering with straightforward maintenance.

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