How loud would a Flowmaster American Thunder Catback exhaust system be on a stock 350TPI? And just so you know I know it'll be louder than stock. Thanks!

 

I think you answered your own question then. Its hard to judge sound preference by a matter of people's opinion. I am sure you will see "loud but not too loud" or "deep tone at idle but it really screams up top." Chances are you will be happy though.