128″ Power Package Engine Performance Kit – Gear Drive

Big-bore bolt-on kit increases 114″/117″ with 4-1/2″ stroke M-Eight with no case machining required; 4-1/4″ bore cylinders with 11:1 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 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 applications; 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 is included; Made in the U.S.A.