Description
Overview
The Flowmaster Flow FX Cat-Back Exhaust System is a complete, bolt-on upgrade engineered for 2017-2025 Ford F250/F350 Super Duty trucks equipped with the 6.2, 6.8, or 7.3-liter engine. Built to breathe better and sound stronger than the restrictive factory setup, this Flow FX system replaces everything from the cat-back rearward with mandrel-bent tubing, a straight-through performance muffler, and dual black ceramic tips that give your Super Duty a purposeful, custom look.
Constructed from durable 409 stainless steel throughout, the system is designed to stand up to the heat, moisture, and road grime that come with hard truck use. The 3.5-inch to dual 3.0-inch mandrel-bent pipes maintain smooth, consistent diameters through every bend, promoting better exhaust gas flow for improved performance and efficiency.
Performance & Sound
At the heart of the system is the Flow FX “straight-through” muffler, measuring 24.00 inches in overall length with a center inlet and dual 3.00-inch outlets. This straight-through design delivers an aggressive-to-moderate sound level and maximum flow. On the dyno, the system revealed maximum gains of +11 horsepower and +15 lb-ft of torque at the rear wheels, giving you real, measurable improvement to back up the enhanced tone.
Style & Fitment
The exhaust exits out both sides, behind the rear wheels, finished with 4.50-inch black ceramic tips featuring an embossed Flowmaster logo for a clean, factory-plus appearance. Because the system uses all existing factory hanger locations, installation is straightforward. Every kit includes installation instructions and all necessary hardware, making this an achievable driveway or home-garage project. The system is also CARB (California) compliant, carrying Emission Code 5.
- Fits 2017-2025 Ford F250/F350 Super Duty with 6.2, 6.8, or 7.3L engines
- 409 stainless steel construction throughout for lasting durability
- 3.5-inch to dual 3.0-inch mandrel-bent pipes for improved flow
- Flow FX straight-through muffler (24.00″ length, center inlet, dual 3.00″ outlets)
- Dyno-proven gains of +11 hp and +15 lb-ft at the rear wheels
- Dual side exit with 4.50-inch black ceramic embossed-logo tips
- Uses factory hanger locations; hardware and instructions included
- CARB (California) compliant, Emission Code 5
Why Choose the Flow FX
Whether you’re towing, hauling, or simply want your Super Duty to look and sound the part, the Flow FX cat-back delivers an aggressive tone, verified power gains, and a rugged stainless build in one cohesive kit. Backed by Flowmaster’s Lifetime Limited Warranty, it’s a confident, long-term upgrade for your truck.
