Borla system is a True Dual design. This Mid-Section includes a merge X-Pipe and S-Type mufflers for increased performance and our distinctive Borla sound. X-Pipes unleash hidden horsepower. It fits with either the O.E. tailpipes or Borla tailpipes. Built from premium T-304 stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, Borla stands behind every Mid-Section with a Million-Mile Warranty. Just what you'd expect from the worlds most experienced (and most winning) exhaust brand.