I just got a full 2 1/2 inch exhaust put on. Removed the cat, as well. Pulls like crazy at 4 grand and above! I'd recommend that mod to anyone. I was happy with my stock turbo, until I got my VJ11/14 hybrid.Now, I can't imagine going back to stock. God forbid I blow up this turbo, 'cause if I do, I'm going to the T-Bird unit. Id's recommend the RocketChip before you do anything major - Let's you get used to what you have, and you'll appreciate your upgrades better!
--Russ