Fits 2021-2024 Harley-Davidson Touring & Tri Glide and 2021-2023 Softail models, including the 2024 Touring 114ci motor.

The Vance & Hines Fuelpak FP4 is the most intuitive fuel tuner on the market. It gives you full control of your Harley-Davidson's tune, live sensor data, and the ability to read and clear trouble codes — all from your phone. Advanced Bluetooth, app-driven technology lets you do 100% of your tuning from the palm of your hand, with best-in-industry support from FP4 technicians.

Mobile control: Do all of your tuning wirelessly from the FP4 app while maintaining 49-state emissions compliance, keeping your Harley-Davidson factory warranty intact.

Live sensor data: Watch real-time sensor readings to keep a finger on the pulse of your machine.

Calibration maps: Choose from an expansive library of 49-state emissions-compliant calibrations, dyno-tuned in-house by Vance & Hines for your specific bike and performance-parts combination.

AutoTune: Tune while you ride. The FP4 uses data from your stock O2 sensors to build a custom map for your air cleaner and exhaust combo — activate AutoTune, take your ride, then flash the results back into your ECM.

Advanced tuning: Advanced users get full access to key ECU tables in the app — adjust idle RPM, raise the rev limit, and edit VE, Target Air/Fuel Ratio, and Spark Advance tables.

Plugs straight into the OBD-II connector — smaller, faster and more powerful than the legendary Fuelpak FP3. Questions on fitment? Call 704-799-2192.