Whats the performance difference between a Catted X-Pipe & an Off Road X-Pipe for a 99 to 04?? What about the sound of an Off road pipe! Is it significantly louder then a catted one?? Too Loud while cruising?? Anybody have an opinion on Magnaflow vs Bassani! I think the best sounding combo I've heard on these year Mustangs was a Bassani X-Pipe and Magnaflow Magnapak Exhaust together but that car had cats on it too!