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Flowmaster American Thunder Cat-back Exhaust System

2009-2022* (*Classic Body) RAM 1500 with 5.7L Hemi engine, and 2009-2013 4.7L models.

Part # 817477 Be the first to write a review
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Delta Flow
Wake up the power and performance of your 5.7L Hemi-powered 2009-2022* (*classic body) RAM 1500, and 2009-2013 4.7L models, with the American Thunder® Cat-back exhaust system. The system is fully constructed from 16-gauge mandrel-bent stainless steel tubing flowing into a 50 Series HD™ performance muffler with minimal interior drone in the cab, but with a moderately deep aggressive exterior tone. This custom system features dual 2.50-inch mandrel-bent tailpipes finished off with a pair of large 4.00-inch polished stainless steel tips exiting straight out the back under the rear bumper for a muscular look. The system includes all necessary parts and hardware required for an easy installation that you can do at home. Covered with our Lifetime Limited Warranty.


  • For RAM Trucks with Exhaust Cutouts in Rear Bumper
  • Mandrel-bent 16-gauge Stainless Steel Tubing
  • Dual Outlet 50 Series HD Performance Muffler
  • Moderatley Aggressive Exterior Exhaust Tone
  • Polished 4.00-inch Stainless Steel Tips
  • Uses the Factory Hanger Locations
  • Clears the Factory Spare Tire
  • Lifetime Limited Warranty
  • Easy Installation

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 PositionDual Out Rear
Heat ShieldNo
Inlet Diameter (in)3
Material409 Stainless Steel
Muffler Part NumberKit Only
Muffler Quantity1
Muffler Series50 Series HD
Outlet Diameter (in)2.5
Product TypeExhaust System
Single DualDual
Sound LevelAggressive
System TypeCat-back
Tip Diameter (in)4
Tip Quantity2
Tubing Diameter (in)3
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817477

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 2009-2022* (*Classic Body) RAM 1500 with 5.7L Hemi Magnum, 2009-2013 4.7L models, 2/4 Wheel Drive, All Wheelbases (Does not fit trucks with factory single exit tailpipe or 2019-2022 New Body.)

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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.