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 is compatible with the widely used DR1 or HB100 pad types. What sets Baer apart is its innovative backing plate, which not only serves as a caliper mount but also cleverly incorporates a modern one-piece park brake shoe assembly. Plus, you'll find stainless braided hoses included for added durability. The 12-inch SS4 is a fantastic fit for most 16-inch or larger wheels and is designed for rear ends with GM Small Pattern 10/12 bolt C-clip (BIH) housing ends (5x4.75", 5x5" BC).