Big Gun 08-10 Polaris RZR 800/RZR 800S/RZR 4 Power Box

Big Gun is known for making performance exhaust systems for powersports vehicles, and this TFI (Throttle and Fuel Injection) Power Box is designed to work with those upgrades. If you've added an aftermarket exhaust to your 2008-2010 Polaris RZR 800, RZR 800S, or RZR 4, this module helps you get the most out of it by fine-tuning how the engine handles throttle input and fuel delivery.

This unit uses third-generation technology to sharpen throttle response, making the power feel more immediate. It also smooths out the power delivery and gives you a noticeable bump in mid-range torque, which is really helpful when you're navigating trails or working the machine. It's built tough with rugged construction and weather-resistant sealing, so it can handle the rough conditions these vehicles often face. Plus, it's designed to be a plug-and-play installation; you don't need a computer to make adjustments thanks to the integrated faceplate buttons.

This power box is highly recommended if you're running an EFI unit with an aftermarket exhaust. It installs in minutes and won't interfere with your stock ECU map, giving you improved performance without sacrificing reliability.