The Chevy B-Body had drum brakes from 1977-93 - disc brakes were introduced to the platform in 1994, but GM kept same brake proportioning valve, and as a result the rear brakes are greatly underutilized on the Impala SS and Caprice. Proforged's Stealth Brake Bolt Kit changes the brake bias from an estimated 95% front / 5% rear to 65% front / 35% rear. It also reduces brakes dive by eliminating the delay in onset for the rear brakes - evening out pad wear and significantly improving braking performance. You can install our products with confidence knowing that every part we sell is backed by our industry-leading 1,000,000 mile limited warranty. We can offer this because our parts are engineered, tested, re-tested, and subject to strict quality control procedures - our quality is second to none. There's a reason why the most well-respected performance suspension brands use Proforged ball joints - we're fanatical about quality, performance, and durability. Professionals save time and money with our competitively-priced products that outlast inferior brands. Do the job with confidence - replace your worn components with the leader in performance ball joints: Proforged. There's a reason that the most well-respected performance suspension manufacturers buy from Proforged: we're the only brand of chassis parts that offers race-day performance at a price within your budget - and backs it up with a 1,000,000 mile limited warranty.