Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is engineered for the driver who wants a genuinely aggressive exterior tone paired with a moderate interior sound that won’t drown out conversation inside the cab. Built from heavy 16-gauge mandrel-bent aluminized steel tubing, this complete cat-back package is designed to deliver durability and maximum performance while transforming the way your truck looks and sounds.
At the heart of the system is a Super 40 Series performance muffler (part number 9530462), Flowmaster’s proven design for that perfect blend of deep, aggressive sound outside the vehicle and a comfortable, moderate tone inside. Whether you’re cruising the highway or towing, the American Thunder system dials in a tone that’s serious without being fatiguing.
Key Benefits
The mandrel-bent 3.00-inch inlet tubing promotes smooth, unrestricted flow, while the dual 2.50-inch tailpipes are routed to clear the factory spare tire. That thoughtful engineering means fewer clearance headaches and a clean, factory-friendly fit.
Exit Options
This system gives you two exit configurations to match how you use your truck. Route the pipes straight out the back for a true dual look, or exit out each side behind the rear wheels — an ideal setup for towing. Each tailpipe is finished with a highly polished 304 stainless steel tip embossed with the Flowmaster name, adding a premium, unmistakable visual signature.
- Heavy 16-gauge mandrel-bent aluminized steel construction for durability and flow
- Super 40 Series performance muffler (PN 9530462) included
- Aggressive exterior tone with a moderate interior tone
- Dual 2.50-inch tailpipes that clear the factory spare tire
- Two exit choices: straight-out-the-back true dual look or side-exit behind the rear wheels for towing
- Polished 304 stainless steel tips embossed with the Flowmaster name
- CARB (California) compliant; Emission Code 5
Installation & Fitment
Designed for an easy fit, the American Thunder system includes all necessary parts, hardware, and instructions for an installation you can complete at home. This configuration fits 2WD and 4WD applications with an extended cab / short bed and a 143.5-inch wheelbase. Please verify your wheelbase and cab/bed configuration before ordering.
The American Thunder Cat-back Exhaust System is backed by Flowmaster’s 3-year Limited Warranty. If you prefer all stainless steel construction with a Lifetime Limited Warranty, consider exhaust system #817428 instead. Note: This product carries a California Proposition 65 warning.
Choose the exit configuration that fits your driving and towing needs, and give your truck the aggressive Flowmaster sound and polished stainless look it deserves.
