Originally Posted by zAd -
do u have the stock cat? if not get a stock cat from a friend and try again.
i could try that, but i don't get it, it's a brand spanking new cat, and it lowered the other 2 gases.
another friend suggested that my new one is a 2 way cat, not 3 way, so it toesn't help NOX gases???
thanks for your reply