Ok here is what I have tried and found out on my CSVT.
First try - Replace resonator with straight pipe = Raspy at first then went away after warmed up.UNTIL you got on the throttle then had major rasp.
Second try - Headers istalled,main cat removed and glas pack put in still has stock mufflers.Sounds ok at highway speeds and normal driving.Still to much much rasp when really get in the throttle.
The best I have heard my car was with just headers when I needed to run out and get some parts for the exhaust.It was a little too loud though,got pulled over in less than a mile.
