S&S Cycle #310-1053C - Power Pack - 4.375" Stroke - Oil Cooled - Black w/o Highlights - M8

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

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
• Oil Pump/Cam Plate:
• 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
• Pushrods:
• Quickee pushrods
• Tappets:
• Hand assembled to exacting tolerances
• Reduced valve train noise from start up to shut down
• Close tolerances for low leak down rates
• Tappet Cuffs:
• Hard anodized black coating
• Billet aluminum construction
• Tappet stability in high lift and high rpm sitiuations
• Camshaft:
• S&S 550 camshaft - designed for big bore applications
• Valve Springs:
• Works well with camshafts up to 0.605" lift
• High performance conical single wire spring
• Includes top collars, keepers, valve seals and bottom collars
• Not for any Trike models.
• Intake/rocker cover gaskets not included.

Specs