S&S 310-1108A Power Pack Gear Drive w/ Highlighted Fins Black Water Cooled M8

• Big-bore bolt-on kit increases 114"/117" with 4-1/2" stroke M-Eight with no case machining required
• 4-1/4" bore cylinders with 11:1 forged pistons
• S&S oil pump/cam plate with blue anodized finish
• Passage plugs are removable for servicing
• Independent scavenge sections for flywheel cavity and cam chest
• Debris screen in both scavenge pickups
• Magnet in cam chest to help prevent debris from entering the oil pump
• Increased oil flow capacity on both the oil feed and scavenge side
• Adjustable pressure relief valve can be adjusted with the unit installed in the engine
• Quickee pushrods with chrome pushrod tubes
• S&S premium tappets
• S&S hard-anodized, black coated tappet cuffs are billet aluminum construction
• Improve tappet stability in high-lift, high-rpm situations
• S&S 550 cams designed for big bore applications
• S&S valve springs work with cams up to .605" lift
• High-performance conical single-wire spring design
• All necessary gaskets, bearings, and hardware for bolt-on installation is included
• Made in the U.S.A.

Not recommended for Tri-Glide or other three wheel models including conversion due to lugging nature of these bikes.