Fromm 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, utilize a live sensor data display, a
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a serious down grade compared to the fp3. ramjet however was incredibly quick with shipping and does not take any blame from me, i would buy from them again… but would not buy the fp4 again