Can anyone point me in the right direction, I have a Norm Butler exhaust on my car and I get a very bad sound of metal vibrating on metal. Norm said the sound is heat shields up around the turbo. Subaru say that there is a rattle in the exhaust. how easy or how much would it cost me to take the heat sheilds off. This noise is getting louder and starting to piss me off.

Thanks Steve.