I get a cat CEL(code 17584)every few days, and I do have the spacer. Fortunately, I can tell what code it is and reset it with my liquidTT.

 

k, thanx. He said it was some dumb $#!t about the 02 sensor gets too cool and then the heater circuit cooks cuz it's always runnin..... I was like, WTF when he said it, and glad i asked u guys b4 i got a hi-flo cat for more money and less power.... btw, any user guides for VAG Commander v1.4? I'm scared to use it, cuz i will be able to kill my ECU.... I have had a little exp on STIs, but this is a different animal..... Thanx for the help PEEPS!

 

I have the 3" 42DD pipe back to 2.75 Magnaflow exhaust single out...225QTT
added about 5-8 hp...nice sound...