Fitment: (2017+) Polaris RZR XP Turbo, (2017+) RZR XP 4 Turbo. The Assault Industries heavy duty rear chassis brace for Polaris RZR XP Turbo is designed and manufactured right here in America. The brace places the upper radius rod mounting points in double shear, increasing rigidity and improving handling feel while driving. The brace is a direct bolt-on upgrade and requires no drilling or modification to install. The rear brace is engineered to be compatible with OEM and aftermarket radius rods.