Oh sure. But if you’re trying to defeat them, just take a broom handle to the cat and smash the matrix out. Put it back in, and put the o2sims in (or turn off t

Oh sure. But if you’re trying to defeat them, just take a broom handle to the cat and smash the matrix out. Put it back in, and put the o2sims in (or turn off the p0420 code with some tuning software, which is what I did with my race car when I pulled the cats).