Vacuum Booster is used in gasoline powered vehicles as source of vacuum. It comprises of standard components like diaphragm and clever valve. A rod is used to establish connection between its pedal linkage and piston of its main cylinder. Engine of vehicles that use Vacuum Booster generates partial vacuum inside this booster. With the hitting of brake pedal of automobiles, connecting rod of this product promotes opening of clever valve so that air can penetrate inside the booster. With the entrance of air, vacuum is sealed off. As its result, pressure is created on diaphragm which in turn pushes the rod.