• Big-bore bolt-on kit increases your 114"/117" with 4¹/₂" stroke M-Eight to 128" with no case machining required
• 4¹/₄" bore cylinders with 11:1 forged pistons
• Wrinkle black finish cylinders without fin highlighting
• S&S oil pump/cam plate with a 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 chain drive cams 
• 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 included
• Made in the U.S.A.

The Air Resources Board (ARB) does not permit the use of aftermarket emission-related parts that alter the air/fuel ratio of an emission-controlled vehicle. Due to these legal restrictions this part cannot be shipped to California.