StopTech® Trophy Race Big Brake Kits® - For The Ultimate In Racing Performance - Designed specifically for motorsports competition and dedicated track cars, the full-floating mounting hardware is unique to the Trophy Race Big Brake System and eliminates pad knock-back. Also specific to the race kits, is the elimination of the dust boots in the caliper so they are not effected by heat extremes. Together, these technologies optimize the brake system to provide consistent pedal feedback under the unique combination of hard cornering and braking found on the track.