When it comes to waking up your S650 Mustang GT, Thermal R&D’s catback exhaust system brings the attitude without the annoying drone. Joe over at Lethal Performance just dropped a new video unboxing and installing this bad boy - and it’s everything you want for that first mod.

In The Box: The Complete Mustang Exhaust System

This system comes ready to hook it up to your stock connection pipes - meaning that this is a direct bolt-on replacement. There's no need for welding, there's no need for cutting, this will simply bolt on where your stock exhaust system once was. It even has all the hangers welded in place to [align with] where your OEM brackets are.

_{Joe, Lethal Performance}

Right out of the gate, Joe highlights the top-shelf build quality of this 2018-23 Ford Mustang GT Fastback 3" custom exhaust system. You’re looking at full 304 stainless steel construction, TIG-welded beauty from front to back, and those signature True Helmholtz Technology - Drone Free Exhaust Sound chambers that keep the cabin quiet while letting your engine howl outside. Thermal’s packaging game is strong too - everything arrives clean, secure, and ready to bolt on.

Note: This system will not fit convertible model Mustangs, and also will not work on Mustangs with the active valving system, so be sure you check all specs before ordering.

What Makes This Mustang Catback Stand Out?

Here’s why Mustang guys are loving this setup:

• Drone Free True Helmholtz Technology: No midrange cabin buzz, even on long highway pulls.
• Deep, Growly Tone Inside - Quiet when cruising but angry when you hit the gas.
• Polished Stainless Tips - And heads up: New carbon fiber tip options are dropping soon for even more models - contact Thermal R&D for estimated date for your model.
• Perfect for Stock Builds - This Mustang had zero other mods. Just the catback. That’s it. And it sounds mean.

Joe even pointed out that if you’re only doing one exhaust mod right now, this is the one that’ll give you the biggest impact without needing tunes or headers.

No Drone. All Growl. Easy Install.

The Mustang exhaust install was smooth - direct fitment, no cutting, no drama. We've also featured several other Lethal Performance Thermal R&D exhaust installs, so if you’re a Ford guy with a Bronco or Explorer, check out their Bronco install and review or Explorer install and review, too.

If you’re looking for built in the USA quality, deep muscle-car tone, and zero interior drone - this Thermal R&D 3" catback exhaust for the Mustang GT checks every box. Thermal R&D builds systems that last a lifetime and resist corrosion - all backed by a lifetime warranty. Shop now and get the sound you crave.