It's worth getting a clutch kit anyway, but if you are planning on engine mods or bigger tires, it's a must.
Go with the Dalton... It's adjustable and you will never need another one. Other kits are specific to certain mods, tire sizes and riding conditions. Each time one changes, you need a different kit.
2010 Teryx LE,
Muzzy's Duel Exhaust
Dalton Clutch Kit
HW Overdrive Clutch Cover
K&N Modded Air Filter
HID Light bar
Odyssey PC925 Battery
Black Rhino gauge Pod (Tach, volt, W Temp)
Muzzy 840, Stage II cams, 38mm throttle bodies,
324 injectors, Water impeller,
new stock crank, rods and barring