Use this MagnaFlow exhaust system when you want to enhance your driving experience, whether it's for daily commuting or weekend road trips. It's perfect for Subaru Legacy owners who love a sporty sound and improved performance. The main piping is 3 inches in diameter, and it has a dual split rear exit with 4 - inch polished welded - on double - wall angle - cut folded - edge tips. The exhaust kit is designed to replace your stock exhaust components from near the catalytic converter on back and is easy to install yourself.