This 3" diameter x 15" long extension pipe is designed to be used with select Borla(r) Cat-Back(tm) systems to extend the systems to fit longer wheelbase vehicles. Includes 1) 3" clamp. Built from premium high-quality austenitic T-304 stainless steel superior to T-400 series (such as 409) to give you the absolute best in performance and durability. Precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all Borla(r) stands behind every adapter/ extension pipe with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.