Shock Therapy Front Spring Retainer (Pair) for Polaris RZR Pro R and Polaris RZR Turbo R ModelsShock Therapy Front Spring Retainer (Pair) for Polaris RZR Pro R and Polaris RZR Turbo R Models Shock Therapy two piece billet spring retainers are available for the Polaris RZR Pro R and Polaris RZR Turbo R models. These retainers are available for both factory and Shock Therapy forks. Our 2 piece design is an industry first with several key advantages: Creates a press fit for Shock Therapy forks further increasing strength and resistance to any sort