ATHENA Piston Kit S4F06400001B 100percent Welded reflective insert on rear

Welded reflective insert on rear improves visibility in low-light conditions

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ATHENA Piston Kit S4F06400001B 100percent Welded reflective insert on rearPiston Kit 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