hey up chaps need some advice, my cousin has a mk2 vts and it has started making a funny noise but only at certain revs. it sounds like a blowing or tapping sound and only does it when you are coming down between 4k-2k revs. when you put your foot back on the accelorator at goes away and also when you put your foot on the clutch it goes, its just when you let the engine brake between those revs. ogh and its really loud as well, loud enough that you can hear it when the radio is on. any ideas?