W&W S&S Forged Pistons 3-5/8" Big Bore Evo Stock Heads 4-1/4" and 4-1/2" Stroke 63-893
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Forged piston >#1900< by S&S
for stock cylinder heads
fits Evolution Big Twins
aluminum
Over-/Undersize: +0.030 "
stroke: 4-1/4 " / 4-1/2 "
nominal bore: 3-5/8 "
gross weight: 1.3 kg
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