S&S CYCLE POWER PK WC GD FIN-HL M8 310-1051AMade in the U. S. A., Big Bore Kit, 107" to 124" Big bore kit, Bolt on kit., No case machining required, Forged pistons, 11. 1 Compression ratio, Oil Pump Cam Plate, Precision machined from billet aluminum, Blue anodized finish, Passage plugs removable for servicing, Independent scavenge sections for flywheel cavity and cam chest, Debris screens in both scavenge pickups, Magnet in cam chest to help to stop debris from entering oil pump, Increased flow