Check Valve functions as a one-way valve that ensures air does not enter the vacuum booster when the engine is turned off or if there is a leak in the vacuum hose.
Universal Billet Brushed Aluminum Brake Booster Vacuum Check Valve w/ 6AN Outlet
Electric Brake Vacuum Pump Relay 28146 For Brake Booster Vacuum Pump
Electric Brake Vacuum Pump Relay For Brake Booster Vacuum Pump, 28146R
28146 12 Volt Electric Vacuum Pump Kit 18" - 22" Brake Brake Booster Vacuum Pump
Power Brake Booster-Original Brake Booster, Vacuum ATE 300189
Power Brake Booster-Original Brake Booster, Vacuum ATE 300123