This is the EBS style of clutch . Meaning It has a one way bearing which adds EBS ( engine brake system) to some years of Sportsman that did not originally come with the feature. If you have certain L.E. models you already had this style clutch and it will perform same as your stock one. If another year or package you will feel that upgrade that it helps you slow down a little when you let off the gas which equals less wear on your brakes.