Quote:
Originally Posted by [ion] C2
So when you let off the throttle, there is a large amount of vacuum pulling through the vacuum hose and there is a large amount of boost pushing on the other side of the valve, making it open.
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Only the manifold vacuum opens the BOV. The HKS SSQV is a pull type BOV. Boost pressure pushes on the back of the valve, holding it closed. It's one of the better BOVs you can get because it's impossible for it to leak.
