You want good and loud, try SLP Loudmouth I. Not version II.
I just ordered some for my truck. I am sure you must have heard a Mustang or three with them on it. That or an F-body.
They are nothing more than an empty resonator that tunes the sound of the exhaust. Go here and hold mouse over pic to see cutaway.
SLP Performance Parts, Inc. - SLP Modular Exhaust Systems