Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is engineered for the 2015-2020 Ford F-150 owner who wants a bold, aggressive exterior sound level while keeping a moderate, livable tone inside the cab. Built from durable 409S stainless steel, this bolt-on cat-back system delivers the performance and craftsmanship you expect from the American Thunder series, all in a package designed to be installed at home.
At the heart of the system is a 3.00-inch mandrel-bent inlet tube that feeds into a Super 40 Series performance muffler, then splits into dual 2.50-inch mandrel-bent tailpipes. The mandrel bending helps maintain smooth, consistent flow throughout, and the setup is finished off with polished 3.50-inch stainless steel tips featuring an embossed logo for a clean, purposeful look under your F-150.
Key Benefits
This American Thunder system is tuned to strike the right balance: an aggressive exterior note that announces your truck, paired with a moderate interior sound so daily driving and highway cruising stay comfortable. The 409S stainless steel construction stands up to the demands of a hard-working truck, while the flanged mount type and included hardware make for a straightforward, easy installation.
- 409S stainless steel construction for durability
- 3.00-inch mandrel-bent inlet tube for smooth flow
- Super 40 Series performance muffler (included)
- Dual 2.50-inch mandrel-bent tailpipes
- Polished 3.50-inch stainless steel tips with embossed logo
- Aggressive exterior / moderate interior sound level
- Flanged mount type with all necessary hardware included
- CARB (California) compliant
Choose Your Exit
Configure the system to match how you use your truck. Select the rear exit that routes under the bumper for a muscular, traditional look, or choose the side exit that routes out behind the rear tires — ideal if you tow an RV, boat, or trailer. Either way, you get the same Flowmaster performance and sound, tailored to your setup.
Fitment
This cat-back system fits all 2015-2020 Ford F-150 models equipped with the 2.7L, 3.3L, and 3.5L EcoBoost, 3.5L TiVCT, or 5.0L engines. It fits all 2WD and 4WD configurations and all wheelbases, with the exception of the Standard Cab / Short Bed. The kit includes all necessary parts and hardware for a bolt-on installation you can complete in your own garage. Note that a heat shield is not included, and this product carries a California Proposition 65 warning.
If you’re after a proven upgrade that adds attitude and performance to your F-150 without compromising in-cab comfort, the Flowmaster American Thunder Cat-back delivers the complete, ready-to-install package.
