Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is a bolt-on, emissions-legal upgrade engineered specifically for 1986-1993 Ford Mustang LX and 1986 GT models equipped with the 5.0L engine. Designed to unlock the true voice and free-flowing performance of the Fox body platform, this complete cat-back system replaces the restrictive factory setup with mandrel-bent tubing and a proven pair of high-performance mufflers. It fits both coupes and convertibles, making it a versatile choice for 2WD Mustang owners who want more power and a serious sound upgrade.
Key Benefits
At the heart of this system is a pair of Super 44 Series mufflers, delivering an aggressive, deep and powerful tone that perfectly complements the iconic 5.0L engine. The free-flowing 2.50-inch aluminized steel mandrel-bent inlet pipes and aluminized steel tailpipes are built to reduce restriction and maximize airflow, helping your Mustang breathe better from the muffler back. The dual tailpipe configuration finishes the look and sound, giving your Fox body the throaty, unmistakable exhaust note enthusiasts love.
Because it’s engineered to use the factory hanger locations, this American Thunder system installs quickly and easily with minimal fuss. Every kit includes all necessary hardware and easy-to-follow instructions, so you can get the job done in your own garage and hit the road with a transformed exhaust experience.
Highlights
- Bolt-on cat-back exhaust system engineered for 1986-1993 Ford Mustang LX and 1986 GT with the 5.0L engine
- Super 44 Series mufflers deliver an aggressive, deep and powerful sound
- 2.50-inch aluminized steel mandrel-bent inlet pipes for free-flowing performance
- Aluminized steel tailpipes in a dual tailpipe configuration
- Uses factory hanger locations for quick, easy installation
- Includes all necessary hardware and easy-to-follow instructions
- CARB (California) compliant and emissions legal
Option & Configuration
This is a complete, muffler-included kit built around the Super 44 Series mufflers, so there’s no guesswork in sourcing components separately. From the free-flowing inlet pipes to the dual tailpipes and all mounting hardware, everything you need for the cat-back section arrives ready to install. Note that a heat shield is not included with this system.
Fitment
Precision-engineered for the Fox body Mustang, this system fits 1986-1993 Ford Mustang LX models and 1986 GT models with the 5.0L engine, in both coupe and convertible body styles. It is designed for 2WD applications and mounts using the factory hanger locations for a clean, direct-fit installation. As a CARB-compliant, emissions-legal system, it lets you upgrade your Mustang’s sound and flow while staying street legal.
