This system produced gains of up to 6.45 HP and 8.12 lbs. x Ft. TQ., as measured on our in - house dyno. This axle - back exhaust system is constructed of 2 - 12 mandrel - bent 304 stainless steel tubing for maximum strength and durability. Finishing off this exhaust system are dual 4 - 12 diameter carbon fiber 304 stainless steel clamp - on exhaust tips. The tips features a laser etched aFe POWER logo for a unique style. This system produces a deep sound unleashing all available horsepower and torque. Utilizing a factory style flange and hangers this system is a direct bolt - on system, which requires no cutting or modifications for a hassle - free installation. A mitered merge collector is used to decrease turbulence and increase exhaust velocity resulting in increased horsepower, torque and improved throttle response. 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.