2010 Polaris 600 Rush. Send us all 4 shocks and we will revalve them to give a better overall ride. Ski shocks get new revalved and new springs to absorb big hits better and improve cornering. Center shock gets new valving to help prevent bottoming of this short travel shock. The Walker Evans rear shock needs the most work as stock it is harsh in the small to medium bumps and bottoms harshly in big G-out hits. We found it to be bottoming fairly often in normal use but did not give the normal bottoming feeling of regular style suspensions. We modify internals to eliminate some harshness on compression, revalve, and put on a new spring. All types of riders from 105 lb beginners to 200 lb experts felt huge improvement. We also set up some for cross country racing with great results. A great all around trail sled with this kit. Also check out our Accelerator Clutch Kit designed for all around trail riding, #AKPL610, makes this sled fun to zip through the tight twisties and picked up a couple of mph on the top end.