This system showcases the impressive S4 4-piston caliper, perfectly paired with a robust 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 accommodates the widely used DR1 or HB100 pad types. What's really neat about Baer's design is its unique backing plate, which not only serves as a caliper mount but also cleverly houses a modern one-piece park brake shoe assembly. Plus, you’ll find stainless braided hoses included for added durability. The 12-inch SS4 is compatible with most 16-inch or larger wheels, making it a great fit for 1970-74 GM F-Body Cars with OE Small Pattern 10/12 Bolt C-clip (BIH) Housing Ends.