The MagnaFlow NEO Series Cat-Back Mustang GT Performance Exhaust System #19579 is made of premium 304 stainless steel and engineered to produce a modern; aggressive sound utilizing our latest technological innovations and decades of exhaust design experience. #19579 creates an aggressive exterior sound while keeping engine noise to a moderate level inside your 2018-2022 Mustang GT. It also features an NDT (No Drone Technology) resonator; which reduces unwanted noises that can otherwise occur at cruising speeds. The 3in. main piping of this exhaust kit passes through a Tru-X pipe which facilitates the improved evacuation of exhaust gases; before terminating in a quad rear exit featuring 4in. black chrome tips. This Ford Mustang exhaust system will integrate with your muscle car s Active Valve Performance Exhaust system; allowing you to open and close the bypass valves as you please (required valves sold separately-MagnaFlow Part #: 10805). Like all MagnaFlow exhaust systems; #19579 has been dyno-tested to ensure improved performance over your Mustang s stock system. The exhaust kit is produced using CNC precision robotic manufacturing and backed by MagnaFlow s Limited Lifetime Warranty.