If you have turned your engine power up a notch, only an advanced braking system will slow you down. This kit includes 2-piston calipers with braided brake lines, and 13in. front and 10.75in. rear drilled/slotted zinc-washed rotors. Note: For installation on 17" Ford OEM wheels or 17in. or 18in. Roush wheels only, to maintain proper caliper clearance.