This braking system is designed with the S4 4-piston caliper, perfectly paired with a 12-inch, one-piece slotted and drilled, zinc-plated rotor. You'll appreciate the D.O.T compliant dust and weather seals that come with the S4 caliper, which is compatible with the popular DR1 or HB100 pad types. What sets Baer apart is its innovative backing plate, which not only serves as a caliper mount but also accommodates a modern one-piece park brake shoe assembly. Plus, stainless braided hoses are included for added durability. The 12" SS4 is designed to fit most wheels that are 16 inches or larger, making it a versatile choice for your ride. This system is a great fit for 1978-88 GM G-Body Cars equipped with OE Saginaw 10 Bolt C-clip (BIH) drum brake housing ends.