aFe Power Gas Cat-Back Exhaust System for Honda Civic Hatchback 2017 - 2021

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 deep sound. The mufflers has a polished finish for ultimate corrosion resistance.Resonator: This system features a 4" x 16" 304 stainless steel resonator to reduce drone. An optional resonator delete pipe is available (PN 49M10007).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.Fitment Note: This item will only fit Hatchback modelsEmissions Disclaimer: This product does not require a CARB EO#.aFe POWER exhaust systems are engineered and manufactured in our Corona, California facility.