Brothers big brake kit use a 12 cross-drilled, gas slotted & zinc washed rotor that mounts to factory axle wtih longer studs supplied, and mates up emergency brake calipers mounted to the rear axle housing with custom caliper mounting brackets. Kits include all rotors, calipers, brake lines, brackets, shortbed cables, hoses, clips, instructions and necessary hardware. This kit requires larger diameter disc brake type wheels (16 minimum). Calipers are shipped gray, painted red for picture. 6 X 5-1/2 bolt pattern. Longbed applications will require custom cables.