With the STI 32" tires and other brands coming out with 32" tires, you will find there will be a little rubbing when turning. This ZBROS +2" forward A Arm kit will be the perfect solution for that if you are planning to run 32" tires. This also gives you a longer wheel base which you will need for racing and serious trail riding. Click the link below for more details.
Zbroz Racing Polaris RZR XP 1000 / RZR XP4 1000 Plus 2 inch Forward A Arm Package :: Side By Side and UTV Parts Warehouse – SXSPerformance.com

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