Universal X-Pipe for building custom exhaust systems. X-Pipes increase performance and improve sound. 3" Inlets, 3" Outlets, 21" Overall Length. Clamps NOT included. Use 18330, 1" wide band clamps on notched Inlet connections. Use 18006, 3" wide band clamps on un-notched Outlet connections. 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 system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.