S4 USMC-Civilianized

Not too loud, but it's definitely there. Some guys have said it's just the turbos spooling more loudly due to more aggressive boost curve (GIAC X sauce). Others have said it's the initial onset of the turbo lady. Ahhhh, the joys of forced induction: paranoia, maintenance costs, and oh yeah....a huge grin on my face every time I hit the gas!

jsballou

Mine are still louder.......

SpfldS4

When's the last time you changed your oil? If you hear the the noise at high RPM then I would worry.

VR_Life

Boost induced smiles, ignoring the warning signs - better find where you local TA meets :-P