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Athena S4F05300002B Piston Kit (105cc Big Bore) (B) 52.96mm
All pistons are forged using a precision heat-treatment process that allows for production tolerances of just. 005mm Forged piston kits are available in A, B and C sizing Forged piston tooling allows for the lightest available product Kits include antiwear coated piston, rings, pin and circlip Made in Germany.