We stock Avid sprockets for all makes and models. We have 3.0" and 3.5" drivers for the Challenger Extreme and Conquer 280 tracks. We also have both center port drive and "Arctic Cat" style extroverts for Polaris'. Price is standard $260 for a pair. We also have Wahl anti-stab kits on hand if you are going to trim rail tips or if you have a newer Arctic Cat Pro-Climb. Price for the kits is $105.