S&S 84" Stock Bore Stroker Kit For 1936-'54 Big TwinsStock bore stroker kits have always been an economical way to increase the displacement of your engine. This S&S 84" stock bore Hot Set Up Kit upgrades 74" knucklehead and panhead 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. Stock bore stroker kits reuse the stock cylinders, saving cost and
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S&S 84" Stock Bore Stroker Kit For 1936-'54 Big Twins