Description
Overview
The Flowmaster Flow FX Cat-Back Exhaust System is engineered specifically for the 1986-1993 Ford Mustang LX (and 1986 GT) equipped with the 5.0L engine. Built to replace your restrictive factory setup, this complete cat-back kit combines durable 409 stainless steel construction with performance-minded design to unlock cleaner exhaust flow and deliver that unmistakable 5.0 attitude. Every component is crafted to bolt into the factory hanger locations, making this a straightforward upgrade you can tackle in your own garage.
Key Benefits
At the heart of the system are Flowmaster’s Flow FX straight-through performance mufflers. This design produces a moderate yet deep and powerful exhaust note on the outside, while keeping interior sound very mild for a comfortable, drone-free driving experience. The 16-gauge, 2.5-inch mandrel-bent tubing promotes unrestricted flow from the cats back, while the 409 stainless steel construction adds long-term durability against heat and corrosion.
Finishing the look are stock-style, polished stainless steel tailpipes that recreate the classic 5.0 appearance Mustang owners love. Each tailpipe features the Flowmaster logo laser etched along the side for an extra touch of style. The dual tailpipe configuration gives your Mustang a purposeful, aggressive stance from the rear.
Highlights
- 409 stainless steel construction for lasting durability and corrosion resistance
- 16-gauge, 2.5-inch mandrel-bent tubing for unrestricted exhaust flow
- Flow FX straight-through mufflers with a moderate, deep exterior tone and very mild interior sound
- Stock-style polished stainless steel tailpipes with laser-etched Flowmaster logo
- Dual tailpipe layout in a silver finish
- Uses factory hanger locations with all necessary hardware included
Muffler & System Details
The included Flow FX mufflers measure 34.50 inches in overall length, feature an offset inlet location and a 2.50-inch outlet diameter, and are finished in silver to match the rest of the system. Muffler inclusion means you get a genuinely complete cat-back solution — no need to source additional components to finish the job. The straight-through internal design is what allows the system to breathe freely while maintaining the refined in-cabin sound level.
Fitment & Installation
This cat-back system is designed to fit the 1986-1993 Ford Mustang LX and the 1986 GT with the 5.0L engine. Because it uses the factory hanger locations and comes with detailed instructions plus all the hardware needed for installation, it’s an accessible, at-home upgrade for the DIY enthusiast. The system is CARB (California) compliant, so it’s a smart choice for owners in emissions-regulated states.
Backed by Flowmaster’s Lifetime Limited Warranty, the Flow FX Cat-Back Exhaust System delivers a proven combination of durability, flow, sound, and classic Mustang styling.
