aFe Power Gas Cat-Back Exhaust System for Ford F-350 Super Duty 2017 - 2021

3" 409 Stainless Steel Construction: This cat-back exhaust system is constructed of 3" mandrel-bent 409 stainless steel tubing for maximum strength and durability.High-Flow 409 Stainless Steel Muffler: This system features a high-flow 409 stainless steel muffler producing an aggressive exhaust tone.Tuned Helmholtz resonator: This system features Dual Tuned Helmholtz resonators integrated into its design to tone down any drone.Dual 4-1/2" Diameter Dual-Wall Black Exhaust Tips: Finishing off this exhaust system are dual 4-1/2" diameter dual-wall black 304 stainless steel clamp-on exhaust tips. The tips features a laser etched 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.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.Fitment Note: This item will only fit Crew Cab / Short Bed models 160 IN WheelbaseEmissions Disclaimer: This product does not require a CARB EO#.aFe POWER exhaust systems are engineered and manufactured in our Corona, California facility.