Flowmaster American Thunder Exhaust for Chevrolet/GMC | 817342

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  • Have a different car? See all Flowmaster American Thunder Cat-Back Exhausts
  • Mild interior drone and aggressive exterior tone
  • Catalog Number: Flowmaster 817342
  • Fits: Chevrolet Avalanche 1500, Chevrolet Suburban 1500, GMC Yukon XL 1500 (check fitment chart for compatibility)

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Flowmaster American Thunder Cat-Back Exhaust | 817342

Product Specifications:

  • Diameter (IN): 2-1/2 Inch
  • Exhaust Tip Material: Stainless Steel
  • Exhaust Tip Size (IN): 4 Inch
  • Exhaust Tip Type: Rolled Edge
  • Exhaust Type: Single
  • Exit Position: Side
  • Includes Exhaust Pipe Muffler Delete: No
  • Includes Exhaust Tip: Yes
  • Includes Hardware: Yes
  • Includes Muffler: Yes
  • Material: Stainless Steel
  • Muffler Brand: Super 50 Series
  • Muffler Configuration: Single Inlet/ Dual Outlet
  • Muffler Quantity: 1
  • Outlet Type: Dual
  • Required Welding: Yes
  • Sound Level: Moderate
  • Type: Cat-Back

Part Fitment List:

Please use our fitment tool above to determine fitment. Additional notes may be required.

2006-2006 Chevrolet Avalanche 1500 LS 5.3L V8
2006-2006 Chevrolet Avalanche 1500 LT 5.3L V8
2006-2006 Chevrolet Suburban 1500 Base 5.3L V8
2006-2006 GMC Yukon XL 1500 SL 5.3L V8
2005-2006 Chevrolet Suburban 1500 LS 5.3L V8
2005-2006 Chevrolet Suburban 1500 LT 5.3L V8
2001-2006 GMC Yukon XL 1500 SLE 5.3L V8
2001-2006 GMC Yukon XL 1500 SLT 5.3L V8
2002-2005 Chevrolet Avalanche 1500
2001-2004 Chevrolet Suburban 1500


Chevrolet Avalanche 1500 exhaust system

The Flowmaster 817342 American Thunder exhaust system delivers exceptional performance for a reasonable price. It is assembled with the best quality parts, each individually crafted and handpicked for the ultimate exhaust flow.

Aggressive tone muffler

The exhaust system includes a 44 series Flowmaster muffler. It is louder than most stock mufflers with a mild interior drone and aggressive exterior tone. It is made of premium grade stainless steel for superb strength and excellent performance.

Optimal Chevrolet Avalanche 1500 performance

The manufacturer has tested the exhaust system on the dyno and proved its quality, performance, and adherence to industrial standards.

Undeterred exhaust flow

The Flowmaster 817342 American Thunder exhaust system also features a mandrel-bent tubing. This allows the exhaust gases to flow smoothly without any deterrence.

Easy bolt-on fitment

The exhaust system is easy to install. It has factory mounting points for a full bolt-on installation. The purchase includes all installation hardware including clamps and bolts. It is advisable to have a professional do the job for the best error-free fitment.

Made strong to last long on your Chevrolet Avalanche 1500

The Flowmaster 817342 American Thunder exhaust system components are made with high-grade steel. It is strong and virtually indestructible. It will withstand years of use to maintain its strength and value.

Limited lifetime warranty

Flowmaster offers a limited lifetime warranty to the stainless steel exhaust systems. A 3-year warranty applies to the aluminized steel exhaust systems. This is a guarantee of superior quality and expert crafting.

Proudly made in the USA

True to its name, the Flowmaster 817342 American Thunder is proudly made in the USA. Expert crafters manufacture each part form the finest and most authentic steel in the industry. The company also creates jobs for thousands of Americans every year and uses locally made materials.

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