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Flowmaster American Thunder Cat-back Exhaust System

2003-2007 Dodge 2500, 3500 trucks with 5.9L Cummins H.O. diesel engine.

Part # 19101FM Be the first to write a review
Estimated shipping date: 05/03/2022
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The American Thunder cat-back single exhaust system is perfect for the person who wants to maximize power, mileage and give your pickup some growl outside without having excessive noise in the vehicle. This cat-back system features large 4.00-inch mandrel-bent aluminized steel tubing, a PRO series performance muffler with our exclusive and proven "laminar-flow" technology giving you the performance and sound you crave. The tailpipe uses the factory hanger locations for an easy installation, and exits out the side behind the rear tire showing off the large polished 5.00-inch stainless steel tip embossed with the Flowmaster logo. This system is especially well suited for heavy load and towing applications. Designed for an easy fit, these systems use the factory hangers, includes all necessary parts and hardware for easy installation you can do at home.


  • Includes Hangers and Hardware for an Easy Installation
  • Mandrel-bent 16-gauge Aluminized Steel Tubing
  • Features our Exclusive Laminar-flow Technology
  • Large 5.00-inch Polished Stainless Steel Tip
  • Moderate Deep Exterior Exhaust Sound
  • Dyno Tuned for Maximum Performance
  • Uses the Factory Hanger Locations
  • PRO Series Performance Muffler
  • Quick and Easy Installation
  • 3-year Limited Warranty

About Flowmaster

Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound.

Brand Flowmaster
Emission Code5
Exhaust SeriesAmerican Thunder
Exit PositionSingle Side Exit
Heat ShieldNo
Inlet Diameter (in)4
MaterialAluminized Steel
Muffler Part Number14020100
Muffler Quantity1
Muffler SeriesPro Series
Outlet Diameter (in)4
Product TypeExhaust System
Sound LevelModerate
System TypeCat-back
Tip Diameter (in)5
Tip Quantity1
Tubing Diameter (in)4
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number19101FM

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Fits 2003-2007 Dodge 2500, 3500 trucks with 5.9L Cummins H.O. diesel engine, fits 2/4 wheel drive and all wheelbases.

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    Some parts are not legal for use in California or other states with similar regulations.