Sup fellas just ordered a test pipe for my a4 1.8t b5. so im really excited bout getting it installed. so is it really loud? i still have the stock exhaust. and what type of gains should i expect and does it release a smell? that cops will notice stay in bay area CA.

 

it does smell at first it helps the turbo spool up a little faster my butt dyno noticed a little differance but was unsure how much