Proudly Aggressive. The way towards improving your Mustang GT’s sound and performance lies ahead -- and all you have to do is upgrade to the Stainless Works Redline Cat-Back Exhaust with H-Pipe. Working with your Ford’s engine to deliver a smooth, drone-free sound, this exhaust system works with 3 modes: the closed-valve “Quiet” mode, the chambered “Normal” mode, and the wide-open “Track” mode.Enhanced Torque and Horsepower. The parts included in the Stainless Works Redline Cat-Back Exhaust with H-Pipe of this exhaust system have been verified to improve horsepower, torque, and fuel efficiency. You can count on this exhaust system to deliver superior performance consistently.Durable Build. Stainless Works’ cat-back exhaust set includes a high-quality H-pipe made from corrosion-resistant, highly durable, TIG-welded 304 stainless steel. Its construction makes it a significant improvement over the factory system. It also features polished quad tips, along with a double-wall conical setup.Straightforward Upgrade. The Stainless Works Redline Cat-Back Exhaust with H-Pipe can be installed with minimal difficulty. This kit comes with all the parts necessary for a successful installation procedure.Application. The Stainless Works Redline Cat-Back Exhaust with H-Pipe set fits all 2018-2023 Ford Mustang GT Fastback models with Active Exhaust.Application Note. This cat-back exhaust system is made for vehicles with the Active Valve Performance Exhaust. It has not been confirmed to fit convertibles.