ok so i haven't been able to get a clear awnser for this yet, and tried searching to no avial, how many cats does the stock 3 have *i.e 1 on headers and 2 on exhaust?* or is it 1 on heads and 1 on exhaust....? thnx in advanced or even better if someone with a stock exhaust could climb under their car and take some pics of the exhaust that'd help too...