This DPF - back exhaust system is constructed of 3 mandrel - bent 304 stainless steel tubing for maximum strength and durability. Finishing off this exhaust system are dual 4 diameter black 304 stainless steel exhaust tips. The tips feature a laser etched aFe POWER logo for a unique style. Utilizing factory style hangers this system is a direct bolt - on system, which requires no cutting or modifications for a hassle - free installation. This DPF - back exhaust system uses a heavy duty flex pipe with an internal interlock liner for added strength and durability. Utilizing state - of - the - art computer - aided design technology, this exhaust system is designed for custom, high tolerance factory fitment. 100 MIG - Welded for race - proven strength and durability. Intercooled tubing provides reduction in exhaust gas temperatures.