This system produced gains of up to +5 HP and +7 lbs. x Ft. TQ., as measured on our in-house dyno. This cat-back exhaust system is constructed of 2-1/2" mandrel-bent 304 stainless steel tubing for maximum strength and durability. This system features a high-flow 304 stainless steel muffler, producing a throaty sound. Finishing off this exhaust system are dual 4-1/2" diameter polished 304 stainless steel clamp-on exhaust tips. The tips features a laser etched Takeda logo for a unique style. This system produces a throaty sound unleashing all available horsepower and torque. Some cutting will 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.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. Takeda 2-1/2 IN 304 Stainless Steel Cat-Back Exhaust System w/ Polished Tips Mazda 3 Hatchback 14-18 L4-2.0/2.5L Mazda 3 Hatchback 14-18 L4-2.0/2.5L