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2009-19* RAM 1500 5.7L Hemi - Outlaw and American Thunder Direct-fit MufflersYouTube Button

Flowmaster American Thunder Direct Fit Muffler

2009-2020* (*Classic body) RAM 1500 5.7L Hemi engine with Factory dual tailpipes.

PART# 817568

1 customer review
$468.00   Suggested Retail
$420.95   Holleydays Price
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Aggressive to moderate sound


"This Flowmaster® American Thunder® direct-fit muffler fits all 2009-2020* (*Classic body) RAM 1500 trucks equipped with the 5.7L Hemi and factory dual tailpipes. Features include full stainless steel construction, a 3.00-inch mandrel-bent inlet pipe flowing into a 50 Series HD™ muffler with large 4.00-inch internals and a built-in resonator helping keep the interior sound down to a minimum, while still delivering a deep moderate aggressive tone outside the vehicle. The system attaches to the factory hanger locations and includes all necessary hardware for a quick and easy installation that you can do at home. Covered by our Lifetime Limited Warranty.


  • Includes Hangers and Hardware for Easy Installation
  • Moderate/Aggressive Exterior Exhaust Tone
  • Dyno Tuned for Maximum Performance
  • 50HD Muffler with Built-in Resonator
  • Uses the Factory Hanger Locations
  • Stainless Steel Construction
  • Lifetime Limited Warranty
  • Flowmaster Quality
  • Easy Installation


Emission Code5
Exhaust SeriesAmerican Thunder
Heat ShieldNo
Inlet Diameter (in)3
Inlet PositionOffset
Material409 Stainless Steel
Muffler Quantity1
Muffler Series50 Series HD
Outlet Diameter (in)2.25
Outlet PositionDual
Product TypeExhaust System
Sound LevelAggressive / Moderate
System TypeDirect-Fit Muffler
Tubing Diameter (in)3
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817568



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

Does Not fit the 2019-2020 new body RAM 1500 trucks or trucks with factory single tailpipe.


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      *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

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

       X  Holleydays 2020 20% off and DD
       X  Holleydays 2020 20% off and DD