This system features brackets to relocated your factory caliper to allow the use of our 14 inch 2pc slot, drill, zinc plated directional rotors. The EradiSpeed+1 is a simple bolt on (no bleeding of the brakes required). By increasing rotors diameter, you increase torque and leverage of the brake. A very popular upgrade for customers increasing wheel diameter that want to improve braking, as well as a visual impact behind the open wheel. Furthermore, the directionally vaned structure helps to advance cooling efforts, and the 2pc design of aluminum hat bolted to rotor ring greatly reduces overall weight!Rotor Diameter:14 inch 2-piecePiston Count:Uses your existing stock calipersPad Type:Uses stock padsMinimum Wheel Size:18 inch (Use template to verify fitment, link below)Includes:14 inch 2pc slot, drill, zinc rotors, brackets and hardwareNotes:Designed to be used with 2005-2014 Mustang. Fits 2007-2012 GT500, Does not fit 2013-2014 GT500 rear