Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is built for the enthusiast who wants their performance to be heard. Engineered as a complete cat-back package, it pairs Flowmaster’s proven flow-through technology with a moderate-to-aggressive exhaust note that lets your engine speak up without becoming overbearing during everyday driving. If you want a subtle custom appearance combined with real performance gains, this Single Side Exit system is a perfect choice.
At the heart of the system is the 50 Series HD muffler, finished in black and matched to silver piping for a clean, purposeful look under the vehicle. The 3.00-inch inlet diameter helps promote efficient exhaust flow, while the single side-exit design keeps the installation tidy and gives your truck a custom feel that stands apart from the factory setup.
Key Benefits
Like all Flowmaster cat-back systems, the American Thunder is designed to deliver more than just sound. Owners can expect improved throttle response, added power, and better mileage compared to a restrictive stock exhaust. The American Thunder series is specifically tuned to produce that signature moderate-to-aggressive tone that Flowmaster is known for, making it a favorite among drivers who want the right balance of daily-driver manners and head-turning presence.
Highlights
- American Thunder series cat-back system tuned for a moderate-to-aggressive tone
- 50 Series HD muffler included, finished in black with silver piping
- 3.00-inch inlet diameter for efficient exhaust flow
- Single side-exit (single out side) configuration for a subtle custom appearance
- Improved throttle response, power, and mileage over stock
- CARB (California) compliant, Emission Code 5
Installation & Fitment
Flowmaster designed this system for an easy, straightforward fit. It includes all necessary parts and hardware for installation, so you can get from the box to the driveway without hunting down extra components. The setup is intended for 2WD applications and uses a single tail pipe layout with side-exit routing. Note that a heat shield is not included with this kit, and the listed muffler is supplied as part of the kit only.
Sound & Compliance
The American Thunder strikes the sweet spot between refined and rowdy — aggressive enough to announce your presence at wide-open throttle, yet controlled enough to keep cruising comfortable. Because it is CARB compliant, this exhaust is suited for use in California and other emissions-regulated areas. As with many performance exhaust products, this item carries a California Proposition 65 warning.
Choose the Flowmaster American Thunder Cat-back Exhaust System when you want a complete, ready-to-install upgrade that combines proven performance gains, a distinctive Flowmaster sound, and a clean single side-exit appearance.
