Stock uses an O ring. Not sure about CS, but it should be the same or a gasket. If you have air coming out of the bypass hose, it suggests an internal seal (unlikely on 3 different ones) or a problem with a reference line somewhere (like the barb on the manifold perhaps). If you cap of the bypass hose (the one you are covering with your hand in the vid) so you still have leaks elsewhere (soapy water is good for finding them)? Also, where is your boost tester attached?
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