ATHENA Piston Kit S4F06640019A
Two-stroke pistons are made from 4032 silicium, Four-stroke pistons are made from 2618 silicium – the same material used to produce Formula 1 pistons, Both include 3% copper in materials for better heat resistance, All pistons are forged using a precision heat-treatment process that allows for production tolerances of just .005mm, Forged piston tooling allows for the lightest available product, Kits include antiwear coated piston, rings, pin and circlips
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