Give your classic 1957 or 1958 Cadillac the stopping power it deserves with this complete power brake conversion kit from Battle Born Brakes! It replaces the old, possibly tired brake system with a modern dual-diaphragm booster and a new master cylinder. Part number 5758CBK. This is a huge safety upgrade that makes driving your vintage Caddy much more confident and comfortable – no more leg muscle needed for hard stops. The kit is designed for a straightforward installation (some mechanical skill required). Brand new in packaging. Whether you're restoring a show car or just want to cruise safely, this conversion is one of the best investments you can make for your classic Cadillac.