THe flowmaster muffler if for a Camaro. It has a single in and dual outs. My car has 2.25" exhaust that connects to a reducer that goes from 2.25" to 2.5" into the muffler. It goes to duals on each side of the car, not side by side. It came on the car when I bought it. It comes with the dual pipes. I can send a pic. $25 plus shipping.