I installed a XTC downpipe w hi flow cat from Cobalt Addiction. I had it for 3-4 months and had a cel light. When i checked the code it said catylist threshold below normal or something like that. My car needed emmissions done, so i did and i failed bad!LOL I put the original on, passed with flying colors. so for future reference, dont throw them away! Keep em, and do the swap when need be! Cheers!

 

you can disable the code with hptuners, idk about canada but US is all obdII now..

 

lol that ***** funny .... welcome to cali