I know- I know this is not legal and all that BS but the great state of Kalifornia has made sure that i cannot put a universal cat or even a 49 state legal cat on my car. And since it is also apparently illegal to go get a cat from a junk yard ( I guess kalifornia figured out that trick ) I am left with no other option but to have that cat installed professionally buy someone with more money than me and who will request more money than I have. Since my piece of crap Mazda has THREE f-ing cats and and I'm not entirely sure which one is the problem, I'm going to try removing the main cat and see if that helps, If it does then I will fully remove it and try to bypass or find a 49 state legal cat until I can afford all the K-Y jelly I will need when I get a Kalifornia legal Cat put on. Any suggestions as to how to bypass this main cat. Can i just run pipe or will that throw off the computer? Any help sticking it the Commie State of Kalifornia and helping out a poor working stiff would be greatly appreciated.