Description
Overview
The Flowmaster Flow FX Cat-Back Exhaust System is a complete stainless steel upgrade engineered for the 2021-2026 Ford F-150 equipped with the 2.7L, 3.5L, or 5.0-liter engine. Built around Flowmaster’s Flow FX series muffler, this cat-back system delivers an aggressive-to-moderate exhaust note along with real, measurable performance gains — all while using factory-mounting locations for a straightforward, bolt-on installation.
Flow starts at a 3.00-inch inlet and transitions into dual 2.50-inch mandrel-bent 409 stainless steel tubing. That mandrel-bent construction preserves the full diameter of the piping through every bend, promoting maximum exhaust flow and long-term durability. On the dyno, this setup produced max gains of 9 horsepower and 10 lb-ft of torque at the rear wheels — usable power you can feel behind the wheel of your F-150.
Sound and Style
The Flow FX muffler is tuned to deliver an aggressive yet moderate tone that adds attitude without droning. Measuring 20.00 inches in overall length with a center inlet and 2.50-inch outlet, the muffler carries a clean silver finish that matches the silver-finished piping. The system finishes with dual embossed tips for a custom look that signals the upgrade underneath.
Fitment
This dual tail pipe system is designed specifically for the 2021-2026 Ford F-150 with the 2.7L, 3.5L, or 5.0-liter engine. It is CARB (California) compliant, carrying Emission Code 5, making it a smart choice for owners in emissions-regulated states who still want improved flow and sound.
Installation and Hardware
Everything needed to get the system on your truck is included. The kit ships with new hangers and all necessary hardware, and it bolts into the factory-mounting locations — no cutting or custom fabrication required for a clean, OE-style fit. The included Flow FX muffler and complete pipe kit take the guesswork out of building the right combination.
- 3.00-inch to dual 2.50-inch mandrel-bent 409 stainless steel tubing for maximum flow and durability
- Flow FX series muffler tuned for an aggressive-to-moderate sound level
- Max dyno gains of 9 hp and 10 lb-ft at the rear wheels
- Dual tail pipes with embossed tips and a silver pipe and muffler finish
- CARB (California) compliant, Emission Code 5
- New hangers and all hardware included; uses factory-mounting locations
Backed by Flowmaster’s Lifetime Limited Warranty, the Flow FX Cat-Back is a durable, great-sounding, performance-minded upgrade for late-model F-150 owners who want more from their truck. Please note: this product carries a California Proposition 65 warning.
