Stock Bore Stroker Flywheel Kit 84" Upgrades 74" and 80" Shovelhead engines to 84" displacement at approximately 8.4:1 or 7.3:1 compression (depending on pistons used) Includes a dynamically balanced 4-1/2" stroke flywheel assembly complete with S&S heavy-duty connecting rods and mainshafts Reuse the stock cylinders, saving cost and retaining stock appearance of the engine Minor crankcase and cylinder modifications are required that can easily be done with hand tools Kit requires special pistons which must be ordered separately (Contact S&S for required pistons). FLYWHEEL 84"STRKR 70-84
