The ACDelco Professional Remanufactured Power Brake Booster is a quality remanufactured part that connects the brake pedal apply system to the master cylinder. Each power brake booster unit contains new seals and O-rings and is the high quality replacement ideal for many vehicles on the road today. Pre-adjusted master cylinder output rods are included where applicable. Remanufacturing power brake boosters is an automotive industry practice that involves disassembly of existing units, and replacing components that are most prone to wear with new components. Damaged and obsolete parts are replaced and are end of line tested to ensure they perform to ACDelco specifications. In addition, remanufacturing returns components back into service rather than processing as scrap or simply disposing of them. ACDelco Professional Remanufactured Power Brake Boosters are also coated to help prevent rust and extend the life of the part. This power brake booster will provide the same performance, durability, and service life you expect from ACDelco.