Hi everyone, new guy: first post. Ive recently picked up an 04 coupe with 13K miles on her. I put a dual tipped flowmaster muffler on her because I like to hear the motor in my cars truoble is...ITS REALLY LOUD! OK I own a Harley and love the loud pipes but WOW..The car sounds super when I get on it but in reality it drowns out normal conversations in the cabin and I can feel it vibrating the seats and other components. The muffler shop told me they could instal a resionater but Im wondering if it will 1) Reduce performance or 2) make it so quiet that Im back to stock decible