Wilwood 140-15951 Wilwood AERO6 Front Truck Kit 14.00in Black 88-98 GMC Truck C1500/C2500Wilwood 140 15951 Wilwood AERO6 Front Truck Kit 14. 00in Black 88 98 GMC Truck C1500 C2500 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,