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" - 2-1/2" 304 Stainless Steel Construction: This cat-back exhaust system is constructed of 3" - 2-1/2" 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 4-1/2" Diameter Carbon Fiber Exhaust Tips: Finishing off this exhaust system are dual 4-1/2" diameter carbon fiber 304 stainless steel clamp-on exhaust tips. The tips features an aFe POWER 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.