Vacuum Shut Off Valve

This little valve helps to reduce the intake manifold vacuum that can cause your system to leak. So if the engine vacuum has got your jar lid down and your having problems with leaking then you need this little guy. We have tested this shut off valve and have seen great results in the fuel economy by cutting the amount of vacuum in half and setting the bubbler to one per second. Fits the 7/32" ID hose best.