Brand new still in box, not used, not "take off" parts. I got this kit when I had a 2005 Mustang GT, but sold the car to buy my GT500 and never opened the box! Brake upgrade kit to convert to Shelby GT500 brakes. Kit includes front 14'' diameter rotors, 4-piston Brembo calipers, GT500 rear brake pads that can be used in the factory rear Mustang GT calipers, and a 4-piece Goodridge SS brake line set. 18'' Diameter wheels must be used for sufficient caliper clearance if this kit is to be installed on a Mustang GT. These typically sell for around $1000.00 from Buyfordracing.com Buy Ford Racing Parts! I will take $800.00 OBO.