Wilwood 140-15305 Wilwood AERO6 Front Hat Kit 14.00 63-87 C10 w/ Wilwood Pro SpindlesWilwood 140 15305 Wilwood AERO6 Front Hat Kit 14. 00 63 87 C10 w Wilwood Pro Spindles 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