WOSSNER Piston Kit Yamaha YZ 250 F Standard 8957DA

2 Stoke Pistons:include piston, rings, pin and clips, Piston made with high quality, permanent skirt coating to reduce friction and piston rock for quiet and improved performance, 4032 T6 Forged Aluminum Alloy, German Engineered from Wossners own designs and forgings, Use FEA (computer simulation) to fine tune every design, T6 Heat Treated for Heat Resistance Durability for High- Load Use