[Alpine TSi]

Keep in mind with new hard pipes and a bigger turbo you will actually hear the air moving through the IC/pipes and actual spool up. I remember that when I got my car back from QPR last summer and I thought it was a big ass boost leak but was actually the sound of air moving through 2.5 stainless pipes. Later that season we did a boost leak test and only found one at where I blocked off the PCV fitting on the intake manifold.