S&S Cycle 310-1227 129" Power Package Engine Performance Kit - Gear Drive - Oil Cooled - Highlighted Fins - M8

Features

• Transform 107" oil-cooled M8 into 129" with no case machining required
• Big bore cylinders come with matching cam, cam plate and oil pump
• Independent scavenge sections for flywheel cavity and cam chest
• Magnet in cam chest to help prevent debris from entering oil pump
• Feature high-performance conical single-wire S&S valve springs
• Original engine serial numbers are retained
• Passage plugs are removable for servicing
• Debris screen in both scavenge pickups
• MLS (multi-layered steel) head gaskets
• Performance matched 550 cam
• Works with stock crankcase
• Made in the USA