So I have put some mods into my FiST but now I'm looking into different downpipes and exhausts and I was curious on what people have been running. Cat vs catless downpipes, 2.5" vs 3" exhausts, res vs no res. The normal things when it comes to exhausts. I want to get a system that sounds aggressive and has some growl to it but won't drive me nuts when I'm just driving around sense this is my daily driver. Let me know what you are using in your FiST!