I am trying to make my car a little louder. I was thinking of removing the rear cat out of the system I already removed the resonator. The 2 individual front cats are staying. I was wondering if any of you had problems with passing the cali smog test after removing the 3rd cat. My car will appear to have the 3rd cat still if I do remove it. I will cut the Y cat apart and weld up a new Y pipe and then weld it into the Y cat and then weld it all back together. I am just trying to make my car sound like it is actually a V8. I don;t wwant it really loud, maybe just a little louder than a stock 2v mustang.