This system showcases the impressive S4 4-piston caliper 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, and it utilizes the popular DR1 or HB100 pad type for optimal performance. What sets Baer's design apart is its unique backing plate, which not only serves as a caliper mount but also cleverly integrates a modern one-piece park brake shoe assembly. You'll also find stainless braided hoses included for added durability. The 12-inch SS4 is compatible with most 16-inch or larger wheels and is designed to fit rear ends with Ford 8"/9" small bearing housing ends, featuring a 5x5.00" bolt circle.