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2003-08 Dodge Ram 2500/3500 5.7L - American Thunder Cat-Back Exhaust System 17438YouTube Button

Flowmaster American Thunder Cat-back Exhaust System

2003-2008 Dodge Ram 2500, 3500 trucks with 5.7L engine. (See applications below)

PART# 17438

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Moderate sound


This aluminized steel cat-back exhaust system fits 2003-2012 Dodge Ram 2500/3500 with the 5.7L Hemi engine, and also fits 2005-2008 Dodge Ram 1500 MegaCab with 5.7L engine. As an American Thunder system, it will provide improved performance and fuel economy while producing a moderate tone inside and outside the truck. Constructed from 16-gauge mandrel-bent aluminized steel tubing flowing into a Super 50 Series™ muffler. The dual 2.50-inch mandrel-bent tailpipes use the factory hanger locations for an easy installation. The system is finished off with a pair of polished 3.00-inch 304 stainless steel tips and comes with two sets of tailpipe exits giving you the option of two exit styles. Either straight out the back under the bumper, or out to the sides behind the rear wheels, which is ideal for towing applications. Easy to follow instructions and all necessary hardware is provided and the system is backed by our 3-year Limited Warranty.


  • Includes Hangers and Hardware for an Easy Installation
  • Mandrel-bent 16 Gauge Aluminized Steel Tubing
  • Connects After Factory Catalytic Converter
  • Uses the Factory Hanger Locations
  • Moderate Exterior Exhaust Tone
  • Clears the Factory Spare Tire
  • Dual Tailpipe Exit Locations


Emission Code5
Exhaust SeriesAmerican Thunder
Exit PositionDual Out Rear / Dual Out Side
Heat ShieldNo
Inlet Diameter (in)3
MaterialAluminized Steel
Muffler Part Number9530572
Muffler Quantity1
Muffler Series50 Series HD
Outlet Diameter (in)2.5
Product TypeExhaust System
Single DualDual
Sound LevelModerate
System TypeCat-back
Tip Diameter (in)3
Tip Quantity2
Tubing Diameter (in)2.5
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number17438



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.

Tech Resources

Fits 2003-2008 Dodge Ram 2500, 3500 trucks with 5.7L engine, also 2005-2008 Dodge Ram 1500 Mega Cab, fits 2/4 wheel drive models and all wheelbases.


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