Description
Overview
The Flowmaster Flow FX Extreme Cat-Back Exhaust System is engineered for the 2021-2026 Ford F-150 equipped with the 2.7L, 3.5L, or 5.0L engine. Built to deliver a deep, powerful tone and increased performance, this stainless steel cat-back system replaces the restrictive factory piping with a purpose-built design that flows better, sounds meaner, and holds up to the rigors of serious driving. At the heart of the kit is a Flow FX series muffler tuned for an aggressive sound that makes your presence known without droning inside the cab.
What sets this system apart is its turndown-style dump exit positioned right after the muffler. By eliminating the traditional over-axle tailpipe, the Flow FX Extreme improves ground clearance and departure angle—an ideal upgrade for trucks that see more extreme off-road situations where rock, ruts, and steep exits can catch a hanging tailpipe.
Key Benefits
Every length of tubing is 3.0-inch mandrel bent 409 stainless steel, chosen for maximum exhaust flow and long-term durability. Mandrel bends keep the inside diameter consistent through every curve, so exhaust gases exit freely for improved performance. The silver-finished muffler and piping give the system a clean, purposeful look under the truck.
- 3.0-inch mandrel bent 409 stainless steel tubing for maximum flow and durability
- Flow FX series muffler delivering a deep, powerful, aggressive sound
- Turndown dump exit eliminates the over-axle tailpipe for better ground clearance and departure angle
- Single tailpipe configuration with a 3.00-inch center outlet and center inlet muffler
- Bolts on using factory hangers and mounting locations for an easy installation
- CARB (California) compliant, Emission Code 5
Options & What’s Included
This is a complete cat-back kit that includes the Flow FX muffler and all necessary hardware to complete the job. The muffler measures 44.30 inches overall with a center inlet and a 3.00-inch center outlet. Note that exhaust tips are sold separately, giving you the freedom to finish the exit exactly how you want it to complement your truck’s look.
Fitment
Designed specifically for the 2021-2026 Ford F-150 with the 2.7L, 3.5L, and 5.0L engines. Because the system uses the factory hanger locations, installation is straightforward and requires no cutting or custom fabrication in most cases—simply remove the stock cat-back and bolt the Flow FX Extreme into place.
Backed by Flowmaster’s Lifetime Limited Warranty, the Flow FX Extreme cat-back is a confident, no-compromise upgrade for F-150 owners who want stronger sound, better flow, and improved off-road clearance in one bolt-on package. This system carries a California Proposition 65 warning.
