Z-Fi TC Option The Z-Fi TC (Traction Control Unit) has all of the same features as the Z-Fi QS with the addition of user adjustable traction control. The Z-Fi TC brings traction control technology from the highest levels of professional racing down to the average racer. The Z-Fi TC does not require any additional sensors to be mounted to the bike, and is fully legal for AMA Super Sport and Super Stock competition. Countless hours of racetrack testing and tuning were used to distill the complicated nature of this technology into a simple and intuitive tuning interface using the Z-Fi software. Traction control is easily adjusted by Throttle Position, RPM, and Gear to suit any track or riding condition. Adjustments on the fly can be made with an optional TC adjust switch, making tuning even more simple. * All the same features of the Z-Fi QS * State of the art Traction Control technology for faster lap times * Adjustable by Throttle Position, RPM, and Gear for optimal performance under all riding conditions * Intuitive software interface for easy tuning * Uses stock sensors only, AMA Super Sport and Super Stock legal All Products are for Closed Race Course Use Only.