When it comes down to it go with what you like, listen to the youtube videos with a surround sound if possible (it's what I did). On my 97 GT I had ubend delete, resonator delete out through two flowmaster 40 series. It sounded like a beast at WOT. On my 98 GTP I have ubend delete, resonator delete and stock mufflers. It has a slight rumble at idle and it's a little louder without the resonator, but when listening to it in the driveway, that thing is raspy as f**k. Oh and good choice on the Overkill tune, I am enjoying mine very much. It's night and day compared to the stock PCM.
