Power Package 128" engine performance kit - PK GR M8 BKG WTR

Big-bore bolt-on kit increases to 114"/117" with a 4-1/2" stroke on the M-Eight without requiring crankcase machining
4-1/4" diameter cylinders with 11:1 forged pistons
S&S oil pump/cam plate with blue anodised finish
Removable drain plugs for maintenance
Independent recovery sections for the sump and camshaft housing
Debris filter on both suction ports
Magnet in the cam cover to prevent debris from entering the oil pump
Greater oil flow capacity in both inlet and return
Adjustable pressure relief valve adjustable with the unit installed on the engine
Quickee rods with chrome tubes
Premium S&S tappets
Black hard-anodised S&S tappet cuffs, manufactured from billet aluminium.
Improves stability of the studs in high lift and high rpm situations
S&S 550 cams designed for high-displacement applications
S&S valve springs compatible with cams up to .605" lift
High-performance single-wire conical spring design
Includes all necessary seals, bearings, and fixings for installation.
Manufactured in the USA
Not recommended for Tri-Glide or other three-wheeled models, including conversions, due to these vehicles' tendency to strain the engine.



Specifications


Brand
S&S CYCLE


Supplier reference
310-1108A


Engine capacity
128"


Base colour
Black


Colour/finish
Prominent fluting, Black Granite


Cylinder Dimensions
4,250"


Style
Big Bore


Stroke length
4,500"


Model
Power Package


Product name
Performance Kit


Compression ratio
11,1:1


Cooling system
Oil-cooled, Water-cooled


Type
Engine


Distribution type
Equipment


Units
Kit