The stock ones don't work as the inner diameter of the pipes is wider. I believe the I.D. is 2.25 inches. I went to autozone and dug thru their collection in the back and luckily found 2 that worked. They look similar to the stock one, and fit perfectly within the indents on the y pipe and headers. Looks like a big O. not the ones that have the holes on the sides for the bolts to go thru. I believe they were felpro brand. Also I bought lock washers and used loc tite on the bolts since after a few hundred miles, one bolt fell off and the rest were loose.
good luck! and what kind of exhaust do you have? I have the stock one and at certain rpms' there is a knocking sound from the muffler.
