hi,

the previous owner of my TT had this valve for this turbo engine. I'm not sure what it is called but it makes this clinging metal sound and you can hear the air. Is this a blowoff valve? Not sure if it does any performance benefit but sounds cool and I want to add one.

Any suggestions, recommendation?

Please help out

 

when was the sound? if it was during shifts then yes. If not, when was this noise made?