This system showcases the impressive S4 4-piston caliper, perfectly paired with a 12-inch, one-piece slotted and drilled, zinc-plated rotor. The S4 caliper is designed with D.O.T compliant dust and weather seals, ensuring durability and reliability, and it works seamlessly with the popular DR1 or HB100 pad types. What makes Baer's design stand out is its innovative backing plate, which not only serves as a caliper mount but also incorporates a modern one-piece park brake shoe assembly. You’ll also appreciate the inclusion of stainless braided hoses for added strength and flexibility. The 12-inch SS4 is compatible with most 16-inch or larger wheels and fits rear ends with Ford 9" early big bearing housing ends (5x5.00" BC).