my soleniod has rubber mounts, the stock solenoid doesnt make any noise, when the blitz control unit is turned off, it runs 7 psi, for the turbo to run at 7 psi the blitz solenoid still has to control the waste gate, but it makes no noise..... which is why i thougth i was the waste gate, but if it was the waste gate it would do it on stock too.... so it looks like i spent $500 to add a noise that gives me the sh!ts.. awesome!