Upgrade the reliability and performance of your existing disc brake system with our Caliper and Rotor Upgrade kit. In this kit you receive everything you need to mount new 4 piston calipers with stainless steel pistons to your existing disc brake system. This kit includes our MaxGrip XDS Cross Drilled & Slotted Rotors as well as Braided Hoses. All components used in these kits are new high quality, precision machined products. This kit is designed for vehicles already equipped with factory 4-piston calipers and does not include mounting brackets.