Originally Posted by
John
well i cant speak for your results on your Caddy, on my Evo I have had this set up for 3 years and not _one_ single SES light for catalyst. I was skeptical of this fix before I tried it but it works as advertised
Did you use two non-foulers per O2 sensor or just one? I saw one link recommending one non-fouler drilled out to 1/2in, and another link where you put the drilled one in a non drilled one.