Thread: Best cat to use with Speed Daddy headers?

crap, i just looked at your bin the second 1/2 of the 420 code i missed or it didnt take .

how many miles you put on it so far? it should become ready still cause the o2 codes and tests are not there to tell it to throw the 420 cat code. it just needs to cycle a bunch of times.

It's a 2001 GTP. And Scotty, I've put 230miles on it so far. I've done the gm drive cycle where you have to put the ac and defroster on for about 2 and a half mins and drive for ten mins. I've done this three separate times from a cold start. I've got everything to say it's emissions ready /except/ for the catalyst and o2 Sensor. I'll post a pic of my emission diagnostic log in a few minutes.