4 409 Stainless Steel Construction This cat - back exhaust system is constructed of 4 mandrel - bent 409 stainless steel tubing for maximum strength and durability. High - Flow 409 Stainless Steel Muffler This system features a high - flow 409 stainless steel muffler, producing a deep sound. 5 Diameter Polished Intercooled Exhaust Tip Finishing off this exhaust system is a 5 diameter polished 409 stainless steel intercooled clamp - on exhaust tip. The tip features an aFe POWER logo plate riveted on for a unique style. Installation Utilizing factory style hangers this system is a direct bolt - on system, which requires no cutting or modifications for a hassle - free installation. Interlock Flex Pipe This cat - back exhaust system uses a heavy duty flex pipe with an internal interlock liner for added strength and durability. Computer - Aided Design Utilizing state - of - the - art computer - aided design technology, this exhaust system is designed for custom, high tolerance factory fitment. MIG - Welded 100 MIG - Welded for race - proven strength and durability. This item fits Crew CabShort Bed ( 69.3 Box), 143.5 Wheelbase, Crew CabLong Bed (78.8 Box), 143.5 Wheelbase, Extended CabLong Bed (78.8 Box) 153 Wheelbase Emissions Disclaimer This product does not require a CARB EO. aFe POWER exhaust systems are engineered and manufactured in our Corona, California facility.