Polaris RZR XP Turbo Big Injector ECU Tuning VRTuned.com March 21, 2017 Company News, Product Info, Tuning Tech With our Stage 1 ECU Tuning for the Polaris RZR XP Turbo completed, we wanted to tackle a more aggressive ECU flash using larger injectors like some of the competition does. But why use larger injectors?...