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 equipped with D.O.T compliant dust and weather seals, ensuring durability and reliability, and it accommodates the widely used DR1 or HB100 pad type. What makes Baer's design stand out is its innovative backing plate, which serves not only as a caliper mount but also houses a sleek one-piece park brake shoe assembly. Plus, you'll find stainless braided hoses included for added performance. The 12-inch SS4 is compatible with most wheels that are 16 inches or larger, making it a versatile choice for your ride. This system fits 1975-81 GM F-Body Cars with OE Small Pattern 10/12 Bolt C-clip (BIH) Housing Ends.