The Fox RC2 shocks are quite possibly the best Fox shocks made for the XP1000 4 seat. What about the internal bypass you might say. While they are an amazing shock, the internal bypass uses a 2" diameter piston in the front shocks while the RC2's use a 2.5" piston. Also, since the RC2's use a smaller outer body than the internal bypass does you can run a smaller diameter coil spring which brings the overall weight of a complete set of RC2's down by 40lbs a set compared to the internal bypass shocks. Finally, the RC2's have an external rebound adjustment that the internal bypass's don't offer. Larger front piston, lighter weight and more adjust-ability add up to serious advantages for you. In addition to those items, Shock Therapy supplies any spring package you need with your purchase. That is right, you can get a custom rate set of springs for your application and needs at no additional cost. RC2's are in stock and ready to ship with any spring package today. Don't wait any longer to get a perfect ride for your XP1000 4 seat.