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2014-20 RAM 2500 6.4L - American Thunder Cat-back Exhaust System 817709YouTube Button

Flowmaster American Thunder Cat-back Exhaust System

2014-2020 Ram 2500 with 6.4L Hemi engine. (See applications below)

PART# 817709

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$1,030.00   Suggested Retail
$926.95   Your Price
Estimated shipping date: 01/22/2021
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Aggressive to moderate sound


The American Thunder® cat-back exhaust system for 2014-2020 Ram 2500 trucks is perfect for the person looking for moderately aggressive interior and aggressive exterior sound levels, with all of the performance benefits that you would expect from Flowmaster®. This bolt-on emissions-legal system fits the Crew Cab Standard Bed/Long Bed and Mega Cab models with a 6.4L engine and coil spring rear suspension. The system features a stainless steel 50 Series HD™ muffler with large 4.00-inch internals. The large dual 3.00-inch stainless steel tailpipes are mandrel-bent to reduce restrictions and maximize performance. The kit has two options for tailpipe exits, either out the sides behind the rear wheels for towing, or straight out the back under the rear bumper. They are finished off with a pair of large 4.00-inch polished stainless steel tips. The exhaust system is covered by our Lifetime Limited Warranty and includes all necessary parts, hardware and easy to follow installation instructions. Note: Fits 149.4, 160.5 and 169.4-inch wheelbases. Does not fit trucks with the optional factory airbag suspension.


  • Stainless Steel 50 Series HD Performance Muffler
  • Dyno Tuned For Maximum Performance
  • Mandrel-bent Stainless Steel Tubing
  • Uses the Factory Hanger Locations
  • Clears the Factory Spare Tire
  • Stainless Steel Construction
  • Includes Two Tailpipe Exits
  • Lifetime Limited Warranty


Catalytic Converter IncludedNo
ColorBlack muffler, natural tubing
Emission Code5
Exhaust SeriesAmerican Thunder
Exit PositionDual Out Rear / Dual Out Side
Heat ShieldNo
Inlet Diameter (in)3.5
Material409 Stainless Steel
Mount TypeFlanged
Muffler Part NumberKit Only
Muffler Quantity1
Muffler Series50 Series HD
Muffler TypeReflection
Outlet Diameter (in)3
Product TypeExhaust System
Single DualDual
Sound LevelAggressive / Moderate
System TypeCat-back
Tip CutAngle
Tip Diameter (in)4
Tip Edge StyleCut
Tip FinishPolished
Tip Length (in)13
Tip LogoEmbossed
Tip MaterialStainless Steel
Tip Quantity2
Tip ShapeRound
Tubing Diameter (in)3
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817709

Service Parts



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 2014-2020 Ram 2500 with 6.4L engine and coil spring rear suspension. Fits crew cab/short Bed, crew cab/long bed and mega cab. Does not fit with factory air bag option.


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