Performance Gains This system produced gains of up to 4 HP and 5 lbs. x Ft. TQ., as measured on our in - house dyno. 2 - 12 409 Stainless Steel Construction This axle - back exhaust system is constructed of 2 - 12 mandrel - bent 409 stainless steel tubing for maximum strength and durability. Dual 4 - 12 Diameter Carbon Fiber Exhaust Tips Finishing off this exhaust system are dual 4 - 12 diameter carbon fiber 304 stainless steel clamp - on exhaust tips. The tips features an aFe POWER logo for a unique style. Installation Requires cutting factory exhaust. Utilizing factory style hangers this system mounts directly to factory mounting locations for a hassle - free installation. Computer - Aided Design Utilizing state - of - the - art computer - aided design technology, this exhaust system is designed for custom, high tolerance factory fitment. Fitment Note Some cutting is required, see instruction sheet for further information. MIG - Welded 100 MIG - Welded for race - proven strength and durability. Emissions Disclaimer This product does not require a CARB EO. aFe POWER exhaust systems are engineered and manufactured in our Corona, California facility.