Universal X-Pipe for building custom exhaust systems. X-Pipes increase performance and improved sound. 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 , Best of all, BORLA(r) stands behind every system with a Million-Mile . Just what you'd expect from the world's most experienced (and most winning) exhaust brand.