[nicks420]

i did install the testpipe with the o2 sensor. The turbo spools up so much quicker, it sounds a little better to. But the check engine light came on the next day. code 67: catalyst system below threshold. Is there any way to get around this issue? I like the performance it gives. I have to get the obd II emmisions test every year here in atlanta. Come on somebody, there has to be an easy hack for this.