Flowmaster American Thunder Cat-Back Exhaust System

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  • 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

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    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

    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

    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

    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 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

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

    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

    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

    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 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

    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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