This extension pipe is used to adapt the 147.4" Wheelbase BORLA® systems to vehicles with Crew Cab with Standard Bed (6' 7") 157" wheelbase. 3" ID inlet, 3" OD outlet, 12" long. Includes 1) 3" Clamp. Built from premium, high-quality austenitic T-304 stainless steel, to give you the absolute best in performance and durability. Precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, BORLA® stands behind every extension pipe with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.