Extension pipe 60693 is used to adapt select BORLA® Cat-Back™ systems to trucks with a Crew Cab with Standard Bed (8') 176" Wheelbase. EXCEPT vehicles with dual rear wheels. 3.5" ID Inlet, 3.5" OD Outlet, 36.5" Long. Includes 1) 3.5" 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. 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.