The S&S M8 Power Package is the ideal combination of performance and savings, designed to transform your M8 without breaking the bank. For the latest generation H-Ds, S&S is packaging their 124in. bolt-in big bore kit with a 550 cam, cam plate and high flow oil pump as well as valve springs, lifters and pushrods. All kits are available with gear or chain drive cams and are designed to make big, reliable power with equally big savings. 107in. to 124in. Big Bore Kit:. Wrinkle black finish. Available with or without fin highlighting. Bolt-on kit, no case machining required. 4.250in. bore. Forged pistons. 11.1 compression ratio. Oil Pump/Cam Plate:. Precision machined from billet aluminum. 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 capacity on both feed and scavenge side. Pressure relief valve is adjustable with unit installed in engine. Pushrods:. Quickee pushrods. Chrome or gloss black pushrod tubes available. Tappets:. S&S premium tappets. Tappet Cuffs:. Hard anodized black coating. Billet aluminum construction. Stronger than stock material eliminates distortion. Improve tappet stability in high lift and high rpm situations. 550 Cam:. S&S 550 cam- designed for big bore applications. Available in both gear drive and chain drive variations. Gear drive kits provide improved cam timing accuracy and eliminate stock chain tensioner. Gear drive kits include outer drive gears. Valve Springs:. High-performance conical single wire spring. Includes top collars, keepers, and valve seals/bottom collars. Made in USa. DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLe. Not legal for sale or use on any EPA pollution controlled motor vehicle.