Well the stock cat was toast so I had the ER Testpipe installed. All I can say is wow. The KO4 can breath an little better and it feels as if the car got chipped again.

So far, I have not noticed a smell while the car is ideling, even with the windows down. As for the noise, other than a little more raspyness at take off, not too much louder with the nuespeed exhaust...

Big thanks to dave and matt at Ecode. I also had my tranny flushed and a fresh dose of motul and new plugs...