The Lone Star Racing MTS Suspension Kit for the Polaris RZR 570 features front and rear a-arms that are +2.5" wider per side for the "trail" models and will match the stock width on the 2017 "S" models. The kit will come with heavy duty front and rear a-arms. The "trail" model kits will come with brake lines and axle shaft, the "S" model kit will not require those parts and will reuse the OEM parts. Both kits will come with heavy duty tie rods. Since the "trail" and "S" models have completely different sway bar setups we have provided mounting tabs on the lower a-arms so it will require the "trail" model sway bar setup or an aftermarket sway bar. Comes with caster spacers to adjust caster on the front a-arms.