Flowmaster American Thunder Cat-back Exhaust System

1993-1995 Chevrolet Silverado, GMC Sierra K1500 trucks with 5.0L, 5.7L engine. (See applications below)

PART# 817473

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Fits 1993-1995 Chevrolet Silverado and GMC Sierra K1500 trucks with 5.0L or 5.7L engine, 4 wheel drive extended cab/short bed only.


For the person who wants the look of a traditional dual exhaust system with all the benefits that a Flowmaster® cat-back exhaust system provides. The American Thunder® exhaust systems are the perfect choice for the person wanting a deep powerful tone outside, with a moderate increase of tone inside the cab. The exhaust system features all mandrel-bent stainless steel tubing, a Super 40® Series performance muffler and dual tailpipes that you can configure for either dual out rear under the bumper, or dual out sides best suited for towing. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for an easy installation and is covered by our Lifetime Limited Warranty. Notes: Fits GM 4-wheel drive extended cab/short bed only.


  • Includes Hangers and Hardware for an Easy Installation
  • Mandrel-bent 16 Gauge Stainless Steel Tubing
  • Connects After Factory Catalytic Converter
  • Covered by our Lifetime Limited Warranty
  • Deep Powerful Exterior Exhaust Tone
  • Super 40 Series Performance Muffler
  • Includes all Hardware


California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Emission Code5
Exhaust SeriesAmerican Thunder
Exit PositionDual Out Rear / Dual Out Side
Heat ShieldNo
Inlet Diameter (in)3
MaterialStainless Steel
Muffler Part NumberKit Only
Muffler Quantity1
Muffler SeriesSuper 40 Series
Outlet Diameter (in)2.5
Product TypeExhaust System
Single DualDual
Sound LevelModerate Sound
System TypeCat-back
Tip Diameter (in)3
Tip Quantity2
Tubing Diameter (in)2.5
Part Number817473


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 1993-1995 Chevrolet Silverado and GMC Sierra K1500 trucks with 5.0L or 5.7L engine, 4 wheel drive extended cab/short bed only.


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