Athena Piston Kit (490cc Big Bore) (A) - 4.00mm Oversize to 99.95mm, 11.6:1 Compression - S4F10000007A

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