I don't have one because they don't have them for Cat!!!! Now that I have that out of my system, they work. Polaris has been running this style clutch in there quads for years. Team bases efficiency of a clutch by how much spring it takes to force the clutch to work. They say 20% less spring compared to there TSS-04. Now that being said, if they make one for my Cat I will buy one!!!! Please!!!