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 inchIncludes:14 inch 2pc slot, drill, zinc rotors, brackets and hardwareNotes:Designed to be used with 1999-2004 GM Truck with 2wd and 4wd disc brakeDesigned to be used with 2000-2006 GM SUV with 2wd and 4wd disc brake