Although I haven't installed it yet, it seems well done. The exhaust pipe comes out with an outside diameter of 2.5 inches. And it fits the 1990 4.3L Vortec [Z] and V8. I downloaded Walker's setup diagram for my truck. Yours may vary but is easy to find on the Walker website. Don't trust the Amazons. "It doesn't match your car" BS. I found that more wrong than right.