From the team that brought you The Fuelpak FP3; the best-selling ECU tuner in the world for Harley-Davidson motorcycles; the Vance & Hines FP4 is the most intuitive tool on the market; giving you the power to control your motorcycle’s tune; view live sensor data; read and clear trouble codes; and offers the best-in-industry support from our FP4 technicians; all from your mobile device.With its state-of-the-art Bluetooth enabled app-driven technology; FP4 empowers you to do 100% of your tuning from the palm of your hand; all while maintaining 49-state emissions compliance and thereby keeping your Harley-Davidson factory warranty intact.- Access to Download and Flash Dyno-Tuned Maps- Autotune Feature Available- Map Optimization Features Include Decel Pop; Throttle Progressivity; Idle; Rev Limit and Speed Limiter Adjustment- Live Sensor Data Viewing- Read and Clear Trouble Codes- 49-State Emissions Compliant