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The S&S Stock Bore Stroker Kit is an economical way to increase the displacement of your engine. This S&S 84" stock bore Hot Set Up Kit upgrades 74" & 80" Shovelhead engines to 84" displacement at approximately 8.4:1 or 7.3:1 compression
- Includes a dynamically balanced 4-1/2" stroke flywheel assembly complete with S&S heavy duty connecting rods and mainshafts
- Piston type determines compression ratio
- This kit requires special pistons
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