Wilwood 140-12929 W6A FRT HAT KIT 14.00Wilwood 140 12929 W6A FRT HAT KIT 14. 00 AERO6 calipers are the newest design for the specific purpose of providing big capacity braking with large diameter rotors for heavy weight and extreme duty vehicles. For cars, its the biggest of the big providing big brake performance for show and dual purpose street and track vehicles. For trucks and SUVs, it provides big stopping power for towing, off road, and enhanced braking with wheel and tire upgrades.