Power Package 129" engine performance kit

Bolt-on Big Bore kit increases 107" M8 to 129" without the need to machine the sump.
4.320" Big Bore cylinder with 11.0:1 forged pistons
Oil pump/cam plate S&S
Removable drain plugs for maintenance
Independent vent 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 supply and return
Adjustable pressure relief valve adjustable with the unit installed on the engine
Quickee rods with rod tubes
S&S premium tappets.
Hard anodised black S&S tappet cuffs, machined from billet aluminium
S&S valve springs compatible with cams up to 0.605" lift
High-performance single-wire conical spring design
HPT496 camshaft designed for large bore applications
MLS head gasket (multi-layer steel)
Includes 129 cam cover plate.
Manufactured in the USA
Maintains original engine height.
Compatible with original crankcases
Compatible with original and S&S rocker arms.
The original engine serial numbers are retained.
Compatible with original valve springs, both first generation (round port) and second generation (oval port).



Specifications


Brand
S&S CYCLE


Supplier reference
310-1396


Features
Chrome pushrod tubes


Engine capacity
129"


Colour/finish
Black, Prominent fins


Cylinder Dimensions
4,320"


Style
HPT496 Series


Model
Performance Kit


Product name
Power Package


Compression ratio
11,0:1


Cooling system
Oil-cooled


Type
Engine


Distribution type
Chain


Units
Kit