GFB Polaris RZR Turbo SXV Recirculating Bypass ValveThe factory diverter valve on Polaris SxS models is made from plastic with a rubber diaphragm. It is known to rupture and cause significant boost leaks, and its "normally open" design means that part throttle boost response is always compromised. The GFB DV+ is a direct replacement diverter valve that offers the ultimate in reliability and performance, backed by a lifetime warranty.