I just recently purchased a black '03 Cobra Convertible that is bone stock. I sold an '03 GT convertible which had Flowmaster 40 series after-cat and a MAC O/R H-pipe. The GT sounded good outside but, it had the dreaded "drone" sound inside the car if any knows what I mean by that (like a humming noise). Any suggestions on which brand of aftercat and mid pipe to use and whether to go with an X or H pipe. I'm kind of leaning toward Magnalfow or Bassani. I'm looking for a good deep rumble at idle and the raspiness under throttle. Any suggestions would be greatly appreciated!!!