I installed a Depo Racing 3" catted downpipe this weekend and I must say it has exceeded my expectations. The quality of the piece and the fitment was excellent. The hardest part of the installation was removing the heatshield from the turbo manifold. I beat the shit out of the heatshield to get it out and so now I'm running without it. I'll probably order a new one from Ford; I heard it's a cheap part. Next challenge, was removing the stock downpipe out after it was unbolted. Wow that was also hard, pretty much impossible to take the downpipe out top, so I pushing it out the bottom and it worked.The Mishimoto downpipe installation video stated that you can wrestle it out from the top but I couldn't unless I was willing to bend the shit out of the hardlines back there.
After a day of driving around with it, I haven't smelled any gas fumes, not even at cold start. I feel like the whole power band has improved as well as much more torque. I did a 4th gear pull on a freeway merge and I was spinning tires. However, it has tripped a cel light. I'm going to wait until I get a fmic until I get a tune revision.