This system showcases a robust 4-piston S4 caliper paired with an 11" two-piece slotted, drilled, and zinc-plated rotor. The S4 caliper is equipped with D.O.T compliant dust and weather seals and is compatible with the widely used DR1 or HB100 pad types. You’ll appreciate the billet aluminum hubs that come fully assembled with top-notch bearings, all packed with Redline synthetic grease, along with sturdy billet dust caps. The rotors are pre-assembled using NAS high-grade stainless hardware for added durability. Plus, all the necessary mounting brackets, stainless braided hoses, and hardware are included to make installation a breeze. The 11" SS4+ is crafted with the same attention to detail as Baer's larger systems, but in a compact design perfect for 15" wheels. It fits 1958-70 Chevy Full Size Passenger Cars equipped with CPP 2" Drop Spindles (#CP30101).