so I'm guessing all vz formentors sound the same ,since new mine in cupra mode gives some good burbles and pops but if i hold the revs about 3500 for a few seconds and then release the throttle and blip it again i get a quite loud backfire ,,,,,its loud enough to make pedestrians look ,im just surprised its so loud on stock setup ,,is this normal ?? makes my brothers 7.5 Golf R sound tame...