Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is engineered to wake up the power and performance of your 5.7L Hemi-powered RAM 1500, along with 2009-2013 4.7L models. Built for truck owners who want a stronger exhaust note and improved flow, this complete cat-back kit replaces the restrictive factory piping with a purpose-built, high-flow system that looks and sounds the part. Every component is designed to work together, delivering a moderately deep, aggressive exterior tone while keeping interior drone inside the cab to a minimum.
At the core of the system is the proven 50 Series HD performance muffler. This heavy-duty muffler is tuned to produce an aggressive sound level that gives your RAM a muscular presence, without the constant boom that can make daily driving tiring. It’s the ideal balance for an enthusiast who wants an unmistakable Hemi rumble on the street and open highway.
Construction & Design
The American Thunder Cat-back is fully constructed from 16-gauge mandrel-bent stainless steel tubing, so exhaust gases flow smoothly through the entire path. The mandrel-bent design maintains consistent diameter through every bend, feeding from a 3.00-inch inlet into the 50 Series HD muffler. From there, the system splits into dual 2.50-inch mandrel-bent tailpipes for a true dual-exit layout.
The tailpipes are finished with a pair of large 4.00-inch polished stainless steel tips that exit straight out the back beneath the rear bumper. The silver stainless finish and oversized polished tips give the truck a purposeful, aggressive appearance that matches its upgraded sound.
Key Highlights
- 16-gauge mandrel-bent stainless steel tubing for durable, smooth flow
- 50 Series HD performance muffler with minimal cabin drone and an aggressive exterior tone
- 3.00-inch inlet feeding dual 2.50-inch mandrel-bent tailpipes
- Dual 4.00-inch polished stainless steel tips exiting straight out the back under the rear bumper
- Muffler included in the kit; heat shield not included
- CARB (California) compliant, Emission Code 5
- Includes all necessary parts and hardware for an easy at-home installation
- Backed by a Lifetime Limited Warranty
Fitment
This American Thunder Cat-back is designed for the 5.7L Hemi-powered 2009-2024* RAM 1500 (*classic body), as well as 2009-2013 4.7L models. The 4WD-oriented design and complete hardware package make it a straightforward upgrade you can tackle in your own garage. Always confirm your exact year, engine, and body configuration before ordering to ensure correct fitment.
If you’re looking to add more attitude to your RAM’s exhaust note and give the back end a bold, dual-tip look, the Flowmaster American Thunder Cat-back delivers aggressive style, high-flow stainless construction, and the confidence of a lifetime-warranted system.
