This system is designed with a 4-piston S4 caliper that’s paired with an 11-inch, two-piece slotted and drilled, zinc-plated rotor. You’ll appreciate the S4 caliper’s D.O.T compliant dust and weather seals, plus it works seamlessly with the widely-used DR1-C pad type. The rotors come pre-assembled, featuring high-grade NAS stainless hardware for added durability. You’ll find all the necessary mounting brackets, stainless braided hoses, and hardware included, making installation a breeze. The 11-inch SS4+ is compatible with most 15-inch or larger wheels and fits rear ends with Dana 60 or Mopar 8-3/4" car housing ends.