Vance & Hines Fuelpak FP4 Autotuner For Harley 66045 Vance & Hines Fuelpak FP4 ECU Tuner The Vance & Hines FP4 is the newest evolution of Fuelpak electronics and most intuitive tool on the market. It gives you the power to control every... $505.95 Add to Cart The item has been added