Ive just fitted a Revo intake to my S3 and now it lets you hear all the turbo noises i can hear what sounds like a wastegate chatter - but whilst im on full throttle! Its almost as if the diverter valve is chattering open and closed allowing boost back to the intake pipe and giving me the noise. Anyone had this? Ive also done Revo PCV delete and rev D diverter valve. Going for a stage 1 Revo map tomorrow! Ill see what its like after remap.