Big Gun Over Rev Box Polaris Predator 500 The Big Gun Over Rev Box offers an effective solution for those seeking to enhance their bike's performance beyond the capabilities of the stock Cdi. This easy-to-install upgrade not only increases the RPM ceiling but also comes with an advanced timing curve, ensuring better throttle response and superior top-end performance. Its design, tailored for a straightforward swap with the existing Cdi, makes it an appealing option for riders looking to boost their machine's output without significant alterations. Features: Increases overall RPM limit Advanced timing curve Easy direct plug in replacement to stock CDI box