Had a guy in Trenton, NJ make me a custon stainless steel 2.5" exhaust for my Spool kit. I used a 2.5" high flow cat that I got from Spool ITS, and a 2.5" straight 6" round Thermal R&D muffler and a 3" tip that I got from Califonia Muffler (or something like that). It sounds great, it's nice and quiet, deep, and looks good. If there's enough interest, this guy may make exhaust systems specifically for Spool ITS turbo kits. If he doesn't, it's still worth driving to Trenton to have him do it if you're within 4 hours of him.