This cat - back exhaust system is constructed of 3 - 12 IN mandrel - bent 409 stainless steel tubing for maximum strength and durability. This system features a high - flow 409 stainless steel muffler, producing a aggressive sound. Finishing off this exhaust system are dual 4 IN diameter black 304 stainless steel clamp - on exhaust tips. The tips features a laser etched aFe POWER logo for a unique style. This system produces an aggressive sound unleashing all available horsepower and torque. Utilizing factory style hangers this system is a direct bolt - on system, which requires no cutting or modifications for a hassle - free installation. 100 MIG - Welded for race - proven strength and durability.