PISTON KIT NAMURA HYPERDRIVE KTM 450EXC 08-12 450 EXC-R 08-11 HUSABERG FE450 09-12 FX450 10-12Piston Kit Namura Hyperdrive KTM 450EXC 08 12 450 EXC R 08 11 Husaberg FE450 09 12 FX450 10 12 Features: Machined smooth piston crown to reflect combustion heat while reducing carbon buildup Hard anodized piston crown with a hardness of HRB 105 MOS2 coating to draw heat through piston walls and out the bottom Minimized piston expansion and contraction Pistons are more resistant to wear and scuffing, expand less with heat and are stronger Higher