Ok, Tial Q is a BOV…which I actually have too. Tial 44 is the wastegate which I can bet is 120dB or louder when open and/or popping off limiter. 
Edit: This is def. louder than that stupid airhorn. http://www.youtube.com/watch?v=yaJJmmp0R7c&playnext_from=TL&videos=A0emKzBdmlE