Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is a complete bolt-on upgrade engineered for the 1986-1993 Ford Mustang LX (Fox body) equipped with the legendary 5.0L engine. Designed to unlock the true voice of your 5.0, this emissions-legal system pairs free-flowing mandrel-bent tubing with Flowmaster’s proven Super 44 Series mufflers to deliver the deep, iconic sound Mustang enthusiasts crave. Every component is built to work together as a matched kit, giving your Fox body a serious performance sound and a show-car finish.
Key Benefits
At the heart of this American Thunder system are 2.50-inch mandrel-bent stainless steel inlet pipes that flow smoothly into a pair of Super 44 Series mufflers. The mandrel bends preserve pipe diameter through every turn, promoting free-flowing exhaust for that aggressive, unmistakable tone. The dual 2.50-inch mandrel-bent stainless steel tailpipes route to the rear and are capped with long 2.50-inch 304 stainless steel tips, so your Mustang looks as good as it sounds.
Installation is designed to be straightforward. The tailpipes use the factory hanger locations for a quick and easy fit, and the kit includes all necessary parts, hardware, and easy-to-follow instructions. That means less time under the car and more time enjoying the sound of your 5.0.
Highlights
- 2.50-inch mandrel-bent stainless steel inlet pipes for free-flowing performance
- A pair of Super 44 Series mufflers for a deep, aggressive, iconic 5.0L tone
- Dual 2.50-inch mandrel-bent stainless steel tailpipes that use factory hanger locations
- Long 2.50-inch 304 stainless steel tips for a show-car look
- Includes all necessary parts, hardware, and easy-to-follow instructions
- Emissions legal and CARB (California) compliant
Fitment
This American Thunder cat-back system is engineered specifically for 1986-1993 Ford Mustang LX (Fox body) models with the 5.0L engine, and it fits both coupes and convertibles. It also fits 1986 Ford Mustang GT models equipped with the 5.0L engine. The system is configured for 2WD applications and features a dual tail pipe layout with the mufflers included as part of the kit. Note that a heat shield is not included.
As a bolt-on, emissions-legal exhaust, the American Thunder system lets you upgrade your Fox body’s sound and appearance without sacrificing street-legal compliance. Whether you’re chasing that classic 5.0 rumble at idle or a commanding presence under throttle, the combination of mandrel-bent stainless steel piping, Super 44 mufflers, and polished 304 stainless tips delivers the aggressive character these cars are known for. Backed by Flowmaster’s Lifetime Limited Warranty, it’s a confident, long-term addition to your Mustang.
