This system showcases the impressive S4 4-piston caliper, perfectly paired with a 12-inch, one-piece slot-drilled, zinc-plated rotor. The S4 caliper is designed with D.O.T compliant dust and weather seals, and it accommodates the popular DR1 or HB100 pad types. What's really cool about Baer's design is the unique backing plate that not only serves as a caliper mount but also cleverly houses a modern one-piece park brake shoe assembly. Plus, you'll appreciate the inclusion of stainless braided hoses for added durability. The 12-inch SS4 is compatible with most 16-inch or larger wheels, making it a versatile choice for your vehicle. It's designed to fit rear ends with Ford 8"/9" small bearing housing ends (5x4.5", 5x4.75" BC).