Performance Gains: This system produced gains of up to +11 HP and +10 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 304 stainless steel tubing for maximum strength and durability. Dual 4-1/2" Diameter Polished Exhaust Tips: Finishing off this exhaust system are dual 4-1/2" diameter polished 304 stainless steel clamp-on exhaust tips. The tips feature a laser etched Takeda logo for a unique style. Powerful Sound: This system produces a powerful sound unleashing all available horsepower and torque. Installation: Some cutting may be required, see instruction sheet for further information. Utilizing factory style flanges and hangers this system mounts directly to factory mounting locations 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. MIG-Welded: 100% MIG-Welded for race-proven strength and durability. Resonator: This system features a 4" x 16" 304 stainless steel resonator to reduce drone. An optional resonator delete pipe is available (PN 49-36622). Emissions Disclaimer: This product does not require a CARB EO#. aFe POWER exhaust systems are engineered and manufactured in our Corona, California facility.