Thanks, Good to hear you say not to worry Matt. My only concern is it didn't used to do it.
I made up a test piece in order to check it for leaks before xmas, with 20psi in I can hear a VERY tiny leak which sounds like its coming from the
lower nearside of the intercooler but until the weathers decent I don't fancy taking the undertray off and getting underneath. It must only be a tiny leak.
The above produces a minor hiss (hardly anything) under acceleration, I didn't think it would cause the "chirp" when pressing the clutch when changing gear while on boost. It doesn't do it when accelerating gently.