Performance Gains This system produced gains of up to 6 HP and 5 lbs. x Ft. TQ., as measured on our in - house dyno. 3 - 2 - 12 304 Stainless Steel Construction This cat - back exhaust system is constructed of 3 - 2 - 12 mandrel - bent, brushed finished 304 stainless steel tubing for maximum strength and durability. High - Flow 304 Stainless Steel Polished Mufflers This system features high - flow 304 stainless steel polished mufflers, producing a smooth sound. The mufflers has a polished finish for ultimate corrosion resistance. Dual 4 - 12 Diameter Blue Flame Exhaust Tips Finishing off this exhaust system are dual 4 - 12 diameter blue flame 304 stainless steel clamp - on exhaust tips. The tips features a laser etched Takeda logo for a unique style. Installation 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. Integrated Mitered Merge Collector A mitered merge collector is used to decrease turbulence and increase exhaust velocity resulting in increased horsepower, torque and improved throttle response. Computer - Aided Design Utilizing state - of - the - art computer - aided design technology, this exhaust system is designed for custom, high tolerance factory fitment. TIG - Welded 100 TIG - 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.