I finally have the infamous CEL giving me the codes P0422 and P0440. I have had a rattle on takeoff in 1st through 3rd gears and now that I have the CEL, it is obvious what my problem is. In fact, this past weekend when I went to take off into traffic, Gayle bogged down big time, almost seemed like limp mode, and when he finally cleared up, I looked in the rear view and saw a big puff of smoke. Now my question is, if I delete my cat, am I going to still have a CEL? Can I get rid off the CEL? I figure since I don't need to have my car checked for emissions, I can save the coin on the cat and get the rest of the exhaust redone with something with a little rumble to it. Any suggestions on exhaust too? Thanks for your input.