New for 2008, 425 Series shocks are aimed at the user who wants a better performing suspension without having to break the bank. Available in Standard or Heavy Duty spring rates, the 425 Series features a beefy 16mm shaft and a twin tube, high pressure nitrogen charged damper. All of which is wrapped in a powder coated coil spring and a touch of chrome making for a stylish shock that cleans up easily. The PSI 425 Series shocks are easy to bolt on and easy to tune via threaded preload adjusters similar to a modern motocross bike. Requires no other mods and can be installed with basic tools.