Fitment: (2020+) Polaris RZR Pro XP. The RZR Pro-XP Radius Rod Plate is a plate designed to replace the stock, flimsy rear plate of the Polaris RZR. The Pro-XP Radius Rod Plate offers strength, style, and function to your buggy. With a machined 100% in-house from Billet 6061 Aluminum it is designed to reduce stress on radius rod bolts and joints, preventing failures.