Description
The S&S CYCLE Power Pack delivers measurable horsepower and torque gains through a coordinated system of big-bore, cam, and induction components—engineered specifically for M8 platforms where bolt-on installation and zero case machining mean you’re back on the road fast. If you’re serious about extracting real performance from your engine without compromise, this kit eliminates the guesswork by pairing a 4.250″ bore with matched valve timing and oil management. Built from billet aluminum and forged internals, every component is precision-machined to work in concert, giving you the reliability professional racers and dedicated enthusiasts demand.
- Big Bore Kit: 4.250″ bore
- Forged pistons included
- 11.1:1 compression ratio
- Bolt-on installation
- No case machining required
- Oil pump billet aluminum
- Precision-machined components
- Removable passage plugs
- Independent scavenge sections
- Debris screens included
- Cam chest magnet protection
- Increased feed flow capacity
- Increased scavenge flow
- Adjustable pressure relief valve
- Quickee pushrods included
- S&S premium tappets
- Billet aluminum tappet cuffs
- Eliminates tappet distortion
- High RPM stability optimized
- S&S 550 Big Bore cam
- MPN: 310-1052B
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