Power Brake Booster also called vacuum servo or vacuum power booster uses a vacuum to increase the drivers pedal force applied to the master cylinder in the brake system. So you do not have to put much force on the brakes for them to actually engage. If you experience a hard brake pedal,a longer stopping distance and engine stalling when when brakes are applied,it’s time to have your brake booster replaced. At Hex Auto Parts,you could find power brake booster replacement at affordable price Without Core Charge,save your cost to replace brake power booster.