Traxxion Dynamics is proud to announce the release of a new piston kit designed to work in conjunction with our new compression valve. The Rebound Axxion Valve is necessary for many late model sportbikes to replace the stock restrictive "orifice" damping pistons. Some models absolutely have to have them, since the stock rebound mechanisms aren't rebuildable or revalvable. Axxion Valves are made to Max McAllister's specifications by Penske Racing Shocks. To reduce weight, they are CNC machined from aluminum. To maintain exact tolerances, they are hard anodized for wear and corrosion resistance. Kits come with highly-polished shims that are made from a proprietary material that has been used by Penske to dominate all forms of motor racing. They have a beautiful, low friction, pre-formed piston band to reduce stiction. These kits are intended to offer uncompromised performance. There were no corners cut in production or materials. They offer tunability of feel never before offered in any aftermarket valving kit. Since uncompromised performance is our goal, we highly recommend installation by our professional "suspension only" shop. We see nothing but poor results and frustration from individuals who have tried to "do it yourself". The money you save will quickly be lost in poor racetrack performance. Racing is inherently dangerous, and we suggest you not make it more so by having "my friend who is a great mechanic" perform your work.