Description
Overview
The Flowmaster® American Thunder cat-back exhaust system is engineered specifically for the 2021-2026 Ford F-150 equipped with the 2.7L, 3.5L or 5.0-liter engine, and it also fits the 3.5L PowerBoost models. Built to upgrade both sound and flow over the restrictive factory setup, this complete catback exhaust replaces the pipes and muffler from the cat-back rearward, delivering a bolder tone and real, measurable performance gains you can feel every time you get into the throttle.
Every part of this exhaust system is manufactured from durable 409 stainless steel tubing and mandrel bent for smoother, more efficient exhaust gas flow. At the heart of the kit is Flowmaster’s proven Super 40 Series muffler, tuned for an aggressive-to-moderate sound level that stays purposeful under acceleration without droning on the highway. On the dyno, this Flowmaster performance exhaust posted maximum gains of 18 horsepower and 14 lb-ft of torque at the rear wheels.
Key Benefits
This American Thunder system is designed for an easy, do-it-at-home installation. It uses all the existing factory hanger locations, so there is no cutting or fabricating required, and it includes installation instructions along with all necessary hardware to complete the job. Dual 4.5-inch black ceramic coated tips with an embossed logo finish the look with serious presence out back, while the silver mandrel-bent piping and black Super 40 muffler round out a purpose-built package.
- Flowmaster American Thunder cat-back exhaust for 2021-2026 F-150 (2.7L, 3.5L, 5.0L and 3.5L PowerBoost)
- Durable 409 stainless steel tubing, mandrel bent for improved exhaust flow
- Super 40 Series muffler (16-inch length, center inlet, dual 3.00-inch outlets) for an aggressive-to-moderate tone
- Dyno-proven gains up to 18 hp and 14 lb-ft at the rear wheels
- Dual 4.5-inch black ceramic coated tips with embossed logo
- Uses factory hanger locations; includes hardware and instructions for at-home install
- CARB (California) compliant, Emission Code 5
Sound & Style
The Super 40 muffler strikes a balance that truck owners love: aggressive when you want it, moderate when you don’t. Paired with the dual tail pipe layout and black ceramic tips, this car exhaust upgrade transforms both the note and the rear-end appearance of your F-150. Whether you’re comparing a Borla exhaust, Corsa exhaust, MagnaFlow exhaust or Walker exhaust, this Flowmaster catback exhaust delivers a distinctive American Thunder character all its own.
Fitment & Warranty
This exhaust system kit is a direct fit for 2021-2026 Ford F-150 trucks with the listed engines, mounting to the factory hangers for a clean, OE-style installation. It is CARB compliant and carries Emission Code 5, and it’s backed by Flowmaster’s Lifetime Limited Warranty. If you’re ready to shop for exhaust that pairs proven power gains with signature Flowmaster sound, this is a straightforward, high-value upgrade.
