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2019-20 RAM 1500 5.7L Hemi - American Thunder Cat-back Exhaust 817843YouTube Button

Flowmaster American Thunder Cat-back Exhaust System

2019-2021 RAM 1500 (New body) with 5.7L Hemi engine and factory dual tailpipes.

PART# 817843

1 customer review
$889.00   Suggested Retail
$799.95   Your Price
Estimated shipping date: 02/12/2021
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Aggressive to moderate sound


The American Thunder® cat-back exhaust system for the 2019-2021 RAM 1500 (New body) with 5.7L Hemi engine and factory dual tailpipes is perfect for the person looking for a deep powerful exterior sound with all of the performance benefits that you would expect from Flowmaster®. This bolt-on emissions legal system features all mandrel-bent stainless steel tubing leading into a 50 Series™ HD muffler that was originally designed specifically for RAM Hemi engines to deliver maximum power and exterior sound quality, but with a moderately pleasant interior tone at cruising speeds. Other features include dual 3.00-inch tailpipes that clear the factory spare tire and are finished with large 4.00-inch black ceramic coated exhaust tips filling out the factory cutouts in the rear bumper. The system utilizes the factory hangers, includes all necessary parts, hardware and instructions for an easy installation you can do at home. Comes with Flowmaster's Lifetime Limited Warranty. Notes: Fits all 5.7L Hemi, 2/4 wheel drive models with 140.5, 144.6 and 153.5-inch wheelbases with 5.7 and 6.4-foot bed lengths.


  • Large 4.00-inch Black Ceramic Coated Tips
  • Mandrel-bent Dual 3.00-inch Tailpipes
  • Large 4-inch 50 HD Muffler Internals
  • Uses the Factory Hanger Locations
  • Deep Powerful Exterior Sound
  • Clears the Factory Spare Tire
  • Stainless Steel Construction
  • Quick and Easy Installation
  • Lifetime Limited Warranty


Catalytic Converter IncludedNo
Emission Code5
Exhaust SeriesAmerican Thunder
Exit PositionDual Out Rear
Heat ShieldNo
Material409 Stainless Steel
Mount TypeUses Factory Hangers
Muffler Body Length (in)18
Muffler ColorBlack
Muffler FinishPainted
Muffler Inlet Diameter (in)3
Muffler Inlet LocationCentered
Muffler Material409S Stainless Steel
Muffler Outlet Diameter (in)3
Muffler Outlet LocationDual Outlet
Muffler Overall Length (in)24
Muffler Part NumberKit Only
Muffler Quantity1
Muffler Series50 Series HD
Muffler ShapeOval
Muffler TypeReflection
Product TypeExhaust System
Single DualDual
Sound LevelAggressive / Moderate
Special Fitment InfoNone
System TypeCat-back
Tip CutAngle
Tip Diameter (in)4
Tip Edge StyleCut
Tip FinishBlack Ceramic Coat
Tip Length (in)13
Tip LogoEmbossed
Tip Material304 Stainless
Tip Quantity2
Tip ShapeRound
Tubing Diameter (in)3
Tubing Material409S Stainless Steel
California Proposition 65 Chemical NameChromium
California Proposition 65 RequiredYes
Part Number817843

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

Does not fit trucks with factory single exit tailpipe or 2019-2021 Classic body.


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