I'm excited, my TTA passed emissions today. It took a new ATR catalytic converter, but it did great. HC was 20 PPM and CO was 0.00%. This is for a basic idle test...but it was blowing 428 PPM last time and 1.2% on CO (the cat. was gutted by a previous owner). Now that is over with, I am looking for a test pipe to install when I take the car to the track. Does anyone have any suggestions? It seems like the car slowed a little, even with the high-flow cat. It might just be my imagination too...it is hard to tell without a G-tech, dyno, drag strip, etc... Oh well, I'm just happy it passed...bring on the mods!