FI2000R Power Pro - Black - VS950/BoltCaracteristicas: Can tune engine fuel delivery in specific ranges, check rpm, read fuel injector pulse width and duty cycle, and add or remove fuel in low or mid range rpm PowerPro Black analyzes, tunes and adjusts your air fuel ratio for peak performance instantaneously Can fine tune the non acceleration air fuel curves using the Bluetooth app Works with stock or modified engines, air cleaners and exhaust systems Tunes acceleration fuel delivery in