I have got a gtx3582r running stock boost and tune atm, I am running a very dodgy aluminium flexible pipe in place of the factory intake muffler(waiting the the process west package to come). So technically it should be louder then any muffler delete pipe on the market, yet intake noise is still quiet.
For a noise test pull the air filter out of the air box and stall the engine on the torque converter or clutch. The sound you hear would be similar to the sound you would have with a k&n panel filter.