what size is the stock y pipe? two 2.5 into a 3? does it look like it has some sort of stripe on the side? or is this the bbk shorties y-pipe. I bought the car and it had the bbk headers. But i heard u could install the headers and keep the old y pipe. I have a 94 and i know that if u ordered the headers a y pipe came with it but the previous owner may have bought the headers used. Can anyone clear this up for me? thanks.

 

Look at the bends in the y-pipe. Are there ridges on the inside of the bends? If so, then it's the stock one. If not, it's the mandrel bent BBK y-pipe.