The Big Guns TFI (Throttle and Fuel Injection) Power Box delivers an effortless performance boost by optimizing throttle mapping and fuel delivery. Simple to install and tuned for broad compatibility, this plug-and-play module sharpens throttle response, smooths power delivery, and enhances mid-range torque, all without sacrificing reliability. Designed with durability in mind, the TFI Power Box features rugged construction and weather-resistant sealing to withstand tough conditions.. Highly recommended for any EFI unit with aftermarket exhaust. Plug-in technology (Does not interfere with stock ECU map). Integrated faceplate buttons provide easy adjustment. Big Gun 06-13 Polaris SPORTSMAN 500 Power Box. Increases horsepower and throttle response. No computer needed to adjust EFI. Third generation technology. 1 Year Limited Warranty. Installs in minutes

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