Fuel-Pack FI2000R Closed Loop Cobra SoftailCaracteristicas: The Fi2000R O2 digital fuel processor is designed to work with all H D Exhaust systems (stock or aftermarket) equipped with oxygen sensors in place (closed loop design) Works much like a carburetor jet kit with adjustments similar to the air mixture screw, the needle and clip positions and the main jet The Fi2000R increases horsepower and torque by optimizing stock lean air fuel mixtures (helps cool the engine temps as well) Quick and