128" Power Package for 114"/117" Oil Cooled M8

128" Power Package for 114"/117" Oil Cooled M8

Made in the USA

Big Bore Kit

Big-bore bolt-on kit increases 114"/117" with 4-1/2" stroke M-Eight to 128" with no case machining required

4-1/4" bore cylinders with 11:1 forged pistons

Oil Pump/Cam Plate

S&S oil pump/cam plate with blue anodized finish

Passage plugs are removable for servicing

Independent scavenge sections for flywheel cavity and camchest

Debris screen in both scavenge pickups

Magnet in camchest 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

Pushrods

Quikee pushrods with chrome pushrod tubes

Tappets

S&S premium tappets

Tappet Cuffs

S&S hard-anodized, black coated tappet cuffs are billet aluminum construction

Improve tappet stability in high-lift, high-rpm situations

Cam

S&S 550 cams designed for big bore applications

Valve Springs

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