S&S Cycle 129" Power Pack - 550 Gear Drive - Oil Cooled - Wrinkle Black W/O Highlight Fins - 107" M8

• Big-bore bolt-on kit increases 107" M8 to 129" with no case machining required
• 4.32" bore cylinders with 11.0:1 compression ratio 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
• S&S premium tappets
• S&S hard-anodized, black coated tappet cuffs are billet aluminum construction
• S&S 550 cams are designed for big bore applications
• S&S valve springs work with cams up to 0.605" lift
• High-performance conical single wire spring design
• All necessary gaskets, bearings and hardware for bolt on installation included
• Made in the USA

Notes

• Not for any Trike models.