Engine Performance Kit Non-Highlighted Fins-Wrinkle Black

Updated profile to fit M8 models including the VVT models

Big bore bolt-on kit increases 107" M8 to 129" with no case machining required

S&S oil pump/cam plate

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 pushrod tubes

S&S premium tappets

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

S&S valve springs
work with cams up to 0.605" lift

High performance conical single wire spring design

MLS (multi-layered steel) head gasket

496 camshaft

Made in the USA

Retains stock engine height.

Works with stock crankcases.

Works with the stock and S&S roller rocker arms.

Original engine serial numbers are retained.

Compatible with the stock valve springs, both first generation (round port) and second generation (oval port).

BORE SIZE	4,320"
CAM DRIVE TYPE	Gear
COLOR/FINISH	Non-Highlighted Fins, Wrinkle Black
COMPRESSION RATIO	11,0:1
COOLING SYSTEM	Oil Cooled
DISPLACEMENT	129"
FEATURES	Black Pushrod Tubes
MODEL	Performance Kit
PRODUCT NAME	Power Package
STROKE LENGTH	4,375"
STYLE	496 Series
TYPE	Engine
UNITS	Kit
VENDOR PART NUMBER	310-1397A