Use this extension pipe with Cat-Back(tm) systems 140645 and 140645BC on Crew Cab With Long Bed (6' 2") 140.5" Wheelbase (140.5") Colorado/ Canyon vehicles. Includes 1) 2.75" clamp. Built from premium 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 extension pipe/ adapter with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.