Flowmaster American Thunder Cat-Back Exhaust System

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Fitment Info

Mild interior drone and aggressive exterior tone Tested dyno tuning Full bolt-on fitment Made with tough steel Limited lifetime warranty Made in the USA

Our #1 value is customer service.

We believe in doing right by our customers, no matter what it takes.

In keeping with that, we offer a “perfect fit guarantee” that ensures your satisfaction on 3 levels: low price, free shipping, and perfect fitment.

- Alan Marek, Founder of PartCatalog.com

The Lowest Price Anywhere--Guaranteed

At PartCatalog, we’ll beat any competing vendor’s price. And we’re so confident in our rock-bottom prices that we’ll refund the difference if you find a lower price elsewhere.

Free Shipping Both Ways

Our “free shipping both ways” policy means that returns and orders ship free of charge. When you place an order, you pay only the list price and any applicable taxes. We cover the shipping to save you money and ensure timely delivery.

100% Guaranteed to Fit

In the highly unlikely event of a fitment problem, we’ll return your purchase at no cost to you. We pay return shipping on all orders, so it won’t cost you a penny to send back a defective part.


  • Excellent performance exhaust system uniquely designed with Flowmaster technology
  • Super 44 series muffler that is louder than stock variety with a deep throaty tune
  • Tested and proven dyno tuning for maximum performance
  • Mandrel bent tubing for maximum undeterred flow
  • Available in two options: stainless steel and aluminized steel
  • Full bolt-on fitment with factory mounting points
  • Made with tough industrial-grade steel to last long
  • Limited lifetime warranty to guarantee quality
  • Made in the USA with authentic material and superior technology
Excellent performance exhaust system

Excellent performance exhaust system

The Flowmaster 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

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 performance

Optimal performance

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

Undeterred exhaust flow

Undeterred exhaust flow

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

Available in two options

Available in two options

You can choose between exhaust systems with stainless steel components and those with aluminized steel.

Easy bolt-on fitment

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

Made strong to last long

The Flowmaster 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

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

Proudly made in the USA

True to its name, the Flowmaster 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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Lifetime Limited Warranty applies to Flowmaster all stainless steel exhaust systems.

Three (3) Year Limited Warranty applies to Flowmaster aluminized steel exhaust systems.

Part Numbers

The following part numbers are available in this product line:

17112, 17113, 17116, 17133, 17142, 17143, 17162, 17171, 17208, 17212, 17213, 17215, 17224, 17233, 17234, 17287, 17312, 17325, 17328, 17342, 17350, 17358, 17368, 17375, 17397, 17406, 17417, 17419, 17423, 17424, 17428, 17429, 17430, 17432, 17436, 17438, 17443, 17468, 17470, 17473, 17476, 817116, 817213, 817312, 817328, 817342, 817397, 817417, 817423, 817424, 817425, 817428, 817432, 817435, 817436, 817470, 817471, 817477, 817479, 817480, 817481, 817486, 817490, 817499, 817507, 817508, 817513, 817519, 817529, 817533, 817541, 817551, 817558, 817567, 817574, 817596, 817602, 817606, 817609, 817614, 817637, 817647, 817658, 817669, 817680, 817684, 817699, 817709, 817716, 817719, 817725, 817730, 817737, 817739, 817741, 817750, 817778, 817784, 817819, 817853

To purchase this product for your vehicle, please select the Year, Make and Model of your vehicle at the top of this page.

Chevrolet (1975-2018)

Avalanche 1500, Blazer, C1500, C2500, C3500, Camaro, Cavalier, Corvette, K1500, K2500, K3500, Silverado 1500, Silverado 1500 Classic, Silverado 1500 HD, Silverado 2500, Silverado 2500 HD, Silverado 3500, Silverado 3500 HD, Suburban 1500, Tahoe

Chrysler (2005-2018)

300, Aspen

Dodge (1994-2018)

Challenger, Charger, Durango, Magnum, Ram 1500, Ram 2500, Ram 3500

Ford (1986-2018)

F-150, F-150 Heritage, Focus, Mustang, Ranger

GMC (1992-2018)

C1500, C2500, C3500, K1500, K2500, K3500, Sierra 1500, Sierra 1500 Classic, Sierra 1500 HD, Sierra 2500, Sierra 2500 HD, Sierra 3500, Sierra 3500 HD, Yukon, Yukon XL 1500

Jeep (1993-2018)

Grand Cherokee, Wrangler, Wrangler JK

Lincoln (2006-2008)

Mark LT

Nissan (2004-2015)


Pontiac (1986-2002)

Firebird, Sunfire

Ram (2011-2018)

1500, 2500, 3500

Scion (2013-2016)


Subaru (2013-2018)


Toyota (2000-2018)

86, Tacoma, Tundra


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