Chris welcome to the site and glad to hear the success with the accessport. I agree with mentioned comments the catted Invidia downpipe would be the way to go to put together a great sounding/performing turbo back exhaust. They are a quality product and will help with emission issues. Far as a matching catback there are a couple options you can go with but I have seen great results from the HKS Hi-Power. Far as other mods change over to the COBB SF short ram intake & delete the air tank in the inner fender, this matched with the exhaust and accessPort will help the car breath well, sound good, and perform nicely. If you need any assistance feel free to contact me.