This 3" diameter extension pipe is used to adapt Crew Cab with Short Bed (5' 7") 144.5" wheelbase Cat-Back™ systems (140415, 140416, 140416BC and 140417) to Crew Cab with Standard Bed (6' 7") 156.5" wheelbase vehicles. Includes 1) 3" clamp. 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 adapter/ extension pipe with a Million-Mile Warranty. Just what you’d expect from the world’s most experienced (and most winning) exhaust brand.