This system produced gains of up to +6.45 HP and +8.12 lbs. x Ft. TQ., as measured on our in-house dyno. This axle-back exhaust system is constructed of 2-1/2" mandrel-bent 304 stainless steel tubing for maximum strength and durability. Finishing off this exhaust system are dual 4-1/2" diameter black 304 stainless steel clamp-on exhaust tips. The tips features a laser etched Takeda logo for a unique style. This system produces a deep sound unleashing all available horsepower and torque. 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. 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 Axle-Back Exhaust System w/ Black Tips Mazda 3 14-18 L4-2.0/2.5L Mazda 3 14-18 L4-2.0/2.5L