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Flowmaster American Thunder Cat-back Exhaust System

2004-2005 Dodge Ram 1500 with 5.7L Hemi engine. Fits all wheelbases.

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Delta Flow
This Flowmaster® American Thunder® Cat-back System is for 2004-2005 Dodge Ram 1500 trucks with 5.7L Hemi engine and all wheelbases. Manufactured using durable 409S stainless steel, the kit features a 2.75-inch to 3.00-inch adapter pipe which flows into the 50 Series HD™ single in/out muffler and into a single 3.00-inch mandrel-bent stainless steel tailpipe. The 3.00-inch tailpipe exits on the passenger side of the vehicle behind the rear tire and is finished off with a 3.50-inch polished stainless steel Flowmaster tip. As an American Thunder system, it provides improved horsepower, mileage and torque along with a deep, moderate sound level on the inside and outside of the vehicle. Instructions and all the necessary hardware are included with the kit for an easy bolt-on installation. Covered by our Lifetime Limited Warranty.


  • Includes Hangers and Hardware for an Easy Installation
  • Mandrel-bent 16 Gauge Stainless Steel Tubing
  • Connects After Factory Catalytic Converter
  • Uses the Factory Hanger Locations
  • Moderate Exterior Exhaust Tone
  • 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 PositionSingle Side Exit
Heat ShieldNo
Inlet Diameter (in)2.75
Material409 Stainless Steel
Muffler Part NumberKit Only
Muffler Quantity1
Muffler Series50 Series HD
Outlet Diameter (in)3
Product TypeExhaust System
Single DualSingle
Sound LevelModerate
System TypeCat-back
Tip Diameter (in)3
Tip Quantity1
Tubing Diameter (in)3
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817513

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 2004-2005 Dodge Ram 1500 with 5.7L Hemi engine, fits all wheelbases.

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