The first cap I blew off at 20 psi or so, the next one I glued on and T-clamped it. that held for few thousand miles before it got replaced with the welded intake. I like having the port on the back for a true boost reading also.
There is lots of force on the rubber cap when running 20lbs of boost, there is about 140 lbs of pressure total pushing on that rubber cap.... When it blows off it's loud! and not to mention embarrassing when your racing a rice burner and all the sudden your down to NA power!
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