Just a suggestion, I have my vacuum lines all plumbed with nylon braided an fittings now. But push connect fittings with 1/4 pneumatic line and firesleeved is not that expensive and probably a better option than silicon and looks much cleaner. The lines and connections support meth injection so our levels of boost aren't even in practice range since I believe this stuff supports 600psi. Prior to my switch some of my silicone was intact but had hardened from heat to the point that it literally broke on the tee fitting above the transmission.
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