Use this MagnaFlow exhaust system when you want to upgrade your 1999 - 2004 Ford Mustang for better performance and a more exciting driving experience. It's great for car enthusiasts who love a sporty look and sound. The main piping is 3 inches in diameter, and it has a dual split rear exit with 3 - inch polished clamp - on single - wall angle - cut tips. The exhaust is made of corrosion - resistant stainless steel, so it's built to last.