S&S Cycle Powerpak Watercool 4.25"Bore4.375"Stroke M8 Blk W/Highlite 310-1051C

Features

• Bolt-on kit
• With updated fins
• No case machining required
• Forged pistons
• Made in the USA
• Includes oil pump/cam plate, pushrods, tappets, tappet cuffs, 550 camshaft, valve springs
• Precision machined from billet aluminum
• Passage plugs removable for servicing
• Independent scavenge sections for flywheel cavity and camchest
• Debris screens in both scavenge pickups
• Magnet in camchest to help to stop debris from entering oil pump
• 44% flow increase on supply side and 58% flow increase on scavenge side
• Pressure relief valve is adjustable with unit installed in engine
• Quickee pushrods
• Hand assembled to exacting tolerances
• Reduced valve train noise from start up to shut down
• Close tolerances for low leak down rates
• Hard anodized black coating
• Billet aluminum construction
• Tappet stability in high lift and high rpm sitiuations
• S&S 550 camshaft - designed for big bore applications
• Works well with camshafts up to 0.605" lift
• High performance conical single wire spring
• Includes top collars, keepers, valve seals and bottom collars