Cobra Fi2000R Fuel Management System with Closed Loop 692-1618CL The Fi2000R O2 digital fuel processor is designed to work with 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 simple installation with plug-and-ride technology with OEM-style connectors No confusing computer downloads to install