Quality begins with a forging. Castings are porous and weak, Hypereutectic pistons are merely a cast piston with an increased silicon content. Although slightly better, they are not nearly as strong as forgings-which are pressed into shape with a 2000 ton press. Wiseco starts with certified extruded bar stock and forges our pistons in-house with the world's most advanced forging presses. Most aftermarket piston companies do not make their own forgings and therefore cannot achieve the level of quality control that Wiseco demands.

ProX pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as is used for all major Japanese engine manufacturers. ProX Piston Kits are a first class solution to replace the original piston in your Personal Watercraft.

Available in Original Series and Platinum Series kits. Original Series pistons are made to exact OEM specifications. Platinum Series pistons are made of high strength hardened aluminum designed to prevent skirt and ring groove breakage. Piston walls are treated with a nonabrasive coating which reduces heat and friction for extended life.