Im sure some of you are tired of these threads but this one will be quick. I am planning on only mildly modifying my GT so for an exhuast setup I was think about, Powerlogs,ZZP downpipe, stock catback and new mufflers. Does that sound like the most effective setup for mild modifications? I was planning on the 2.5'' downpipe without the cat, or does that get too noisy?