OE style Polaris primary (aka drive) clutch made specific for 2011-2014 RZR 900 XP. This clutch is made just for RZR 900 unlike other aftermarket ones I have seen. This one has the EBS bearing ( 1 way bearing) in it. It can be used to add additional engine braking on 900 XP as it already came with a EBS type secondary . I also have the NON EBS type .