Description
The S&S Cycle Power Pack delivers the displacement and breathing efficiency your M8 demands without tearing down the engine. This bolt-on big bore kit combines precision-engineered components—forged pistons, a purpose-built cam, and an optimized oil system—to unlock reliable power gains while maintaining stock-level serviceability. Whether you’re a track competitor or a serious builder, this is the foundation for maximizing your M8’s potential.
- 4.250″ bore diameter
- Forged piston construction
- 11.1:1 compression ratio
- Bolt-on installation
- No case machining required
- S&S 550 Cam included
- Quickee pushrods
- S&S premium tappets
- Billet aluminum tappet cuffs
- Precision-machined oil pump
- Independent scavenge sections
- Increased feed capacity
- Increased scavenge capacity
- Adjustable pressure relief valve
- Debris screens on pickups
- Magnetic cam chest protection
- Removable passage plugs
- MPN: 310-1056B
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