i had spintech with an o/r xpipe on my 01gt, let me tell you, that car sounded crazy. People would always give me a drive by thumbs ups, even had a cop do that. When I had my 1st 5.0 i wanted the 4.6 sound, then when I had the 4.6, i wanted the 5.0 sound again. Guess it's what one can't have