This new cap is very robust in its construction to significantly reduce the binding caused by the stock cap in RZR Turbo and RS1 models. This decreases heat and friction, improves clutching consistency and performance and lengthens clutch and belt life. One key to our design is the tight tolerance bronze bushing that we use. This bushing is flanged to insure that it stays in place and the tighter tolerance between the bushing and the spider nut helps further reduce heat and friction caused by cap bushing bind to eliminate the problem rather than just deal with the headaches the extra heat and friction create. This kit comes complete with a new spider nut that has been machined in the castle area to allow its use with the tight tolerance bushing.