This kit features the same rear brake components as the optional "big brake" kit on our Revology Mustangs. Four piston calipers, 13” two-piece rotors, and high performance BP-10 compound pads provide optimized and balanced braking to compliment the 140-13224 kit. The neatly hidden internal shoe system provides a clean installation with superior static holding power for parking. For use with 17” and larger wheels. Available in black, red, blue, yellow, and silver powder coat, and polished. Cross-drilled rotors are also available, call us for details! Stock item. For use with Flexline kit 220-9886.