Thanks for the advice. Wasnt sure what was best between K&N and JWT. Im looking to make my TT Z stage 3 in the near future. Wondering if exhaust components from SpecialtyZ.com are a good idea? www.specialtyz.com has some nice looking set ups, wasnt sure if they were godo or not though. Any experience with these? I really want the flat muffler design and dual tips, but i may go for singles. Definely want the flat muffler design because it keeps the car looking low and wide, instead of tall and wide like the big round mufflers do. Any suggestions?