Flowmaster® - American Thunder™ Exhaust System

4.553 reviews / Item # sp25
Flowmaster® - American Thunder™ Stainless Steel Cat-Back Exhaust System (Dual Rear Exit)
Flowmaster® - American Thunder™ Stainless Steel Cat-Back Exhaust System (Dual Rear Exit)Flowmaster® - American Thunder™ Stainless Steel Cat-Back Exhaust System (Dual Rear Exit)Flowmaster® - American Thunder™ Stainless Steel Cat-Back Exhaust System (Dual Rear Exit)Flowmaster® - American Thunder™ Aluminized Steel Axle-Back Exhaust System (Single Rear Exit)Flowmaster® - American Thunder™ Aluminized Steel Header-Back Exhaust System (Dual Rear Exit)Flowmaster® - American Thunder™ Aluminized Steel Header-Back Exhaust System (Dual Rear Exit)Flowmaster® - American Thunder™ Aluminized Steel DownPipe-Back Exhaust System (Single Side Exit)Flowmaster® - American Thunder™ Stainless Steel Axle-Back Exhaust System (Dual Out Rear Exit)Flowmaster® - American Thunder™ Aluminized Steel Cat-Back Exhaust System (Dual Rear Exit)Flowmaster® - American Thunder™ Aluminized Steel Cat-Back Exhaust System (Dual Rear Exit)Flowmaster® - American Thunder™ Stainless Steel Header-Back Exhaust System (Dual Rear Exit)Flowmaster® - American Thunder™ Aluminized Steel Cat-Back Exhaust System (Dual Same Side Exit)Flowmaster® - American Thunder™ Stainless Steel Cat-Back Exhaust System (Dual Out Rear Exit)Flowmaster® - American Thunder™ Stainless Steel Cat-Back Exhaust System (Dual Out Rear Exit)Flowmaster® - American Thunder™ Stainless Steel Crossmember-Back Exhaust System (Dual Out Side Exit)Flowmaster® - American Thunder™ Aluminized Steel Axle-Back Exhaust System (Single Rear Exit)Flowmaster® - Exhaust TypesFlowmaster® - American Thunder™ Stainless Steel Cat-Back Exhaust System Installation InstructionsFlowmaster® - American Thunder™ Exhaust Systems Aggressive SoundFlowmaster® - Product Information and TechnologyFlowmaster Authorized Dealer
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flowmaster exhaust system

American Thunder™ Exhaust System by Flowmaster®. American Thunder gives you the Mild-Moderate Sound / Moderate Sound / Aggressive Sound / Moderate-Aggressive Sound / Mild Sound (depends on application and exhaust type) of a Flowmaster chambered exhaust, which is the classic sound of classic American big performance engines. This is a system that gives the most sedate vehicle a performance rumble. American Thunder is perfect for a wide range of cars, from ponies to sleepers.

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Features:

  • Available sound levels: Mild-Moderate Sound / Moderate Sound / Aggressive Sound / Moderate-Aggressive Sound / Mild Sound (depends on application and exhaust type)
  • Increases Power
  • Increases Torque
  • Every System Tuned on Dynamometer
  • Perfect Fitment

American Thunder gives you exactly the sound that is promised by the name of the series. The exhaust sound of the American Thunder system has become a symbol of American power that is recognized all over the world. American Thunder is the most popular of the Flowmaster exhaust systems, enhancing power, torque, throttle response and mileage for automobile enthusiasts all over the world.

All Flowmaster exhaust systems give the same improvement of performance. All Flowmaster exhaust systems produce a beautiful deep performance tone. Choosing between the five different exhaust systems is not a technical decision – it is all up to your personal taste. It’s A Sound Decision™. The racing origin is evident in every Flowmaster exhaust system. All the five series of systems are tuned for maximum performance. They differ in technology and tuning, and thus in tone and character, giving you a performance engine sound to your personal liking.

Flowmaster exhaust systems employ two unique technologies, the patented Delta Flow and the Laminar Flow. They give different characters of sound and can be tuned to achieve the desired exhaust note. Flowmaster Exhaust System Technology is so versatile and gives such a high degree of control that it is used both by racers, who want maximum power, and by the U.S. Air Force in Stealth applications, where maximum silence and minimum heat emissions are prime considerations.

Be it for a domestic or import truck, SUV, off-road warrior, daily driver, muscle car, euro-spec cruiser or sport compact vehicle, Flowmaster technicians personally hand select the right muffler, tubing size, resonator, and tip to make the process easy for you. Best of all, Flowmaster stainless steel exhaust systems are covered by a Limited Lifetime Warranty; ensuring that your exhaust will last as long as you own your vehicle. If you choose aluminized steel products, Flowmaster backs them up with a 3-year warranty.

Flowmaster® has its roots in solving the engine noise problems encountered by California racers in the 1980s. In 1983 Flowmaster’s founder, Ray Flugger, created his first patented design of racing silencers, which dampened noise with minimal loss of power. Ray attached handles to ease carrying the square shaped race mufflers through the race pits, and the mufflers became known as the "suitcase mufflers." Today, the innovative Flowmaster mufflers are the result of years of development with top race engine builders, thousands of hours of dyno research and "real-world" on-track testing.

Product Reviews

(53)

Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

Flowmaster® - American Thunder™ Stainless Steel Cat-Back Exhaust System (Dual Rear Exit)
Flowmaster® - American Thunder™ Exhaust System
Average Rating: 4.6 of 5
4.5
4.3 of 5
Flowmaster American Dual Exhaust System
Looks and sounds great on my Tahoe. I had an exhaust pro shop put them on for me.
JPosted by (Mason City, IA) /
2007 Chevy Tahoe
Was this review helpful for you? Yes
5 of 5
Nice Growl
The product works great, I was looking for a nice growl for my Camaro and I have it now.
PPosted by (Warrington, PA) /
2012 Chevy Camaro
Was this review helpful for you? Yes
5 of 5
Perfect!
The sound is awesome and it looks great on my FR-S.
MPosted by (Beaverton, OR) /
2013 Scion FR-S
Was this review helpful for you? Yes
4.8 of 5
Flows
Great sounding exhaust.
JPosted by (Walnut Cove, NC) /
2004 Nissan Titan
Was this review helpful for you? Yes
5 of 5
Dodge
My car before was decent had a nice stock V8 rumble to it but once I have these installed I feel like I'm driving a beast! I get so many head turns and looks and the look of the pipes coming out of the back is awesome! If you want a great growl out of your car this exhaust system is the way to go!
CPosted by (Blacksburg, VA) /
2007 Dodge Charger
Was this review helpful for you? Yes
4.8 of 5
Stealth Mode On [Off]
Nice deep, loud roar when she's on the hunt. Nice quiet purr when she's resting at idle. Easy enough install, great power gains when matched with my cold air intake! Not your typical import sound! I love the fact that the tips aren't too flashy, because while she is loud, she doesn't scream "overcompensation package". Just make sure you torque down the clamps tight enough or she'll shake herself loose.
EPosted by (Hayden, AL) /
2013 Scion FR-S
Was this review helpful for you? Yes
2 of 5
Did Not Fit The Del Sol!
This did not fit the Honda Del Sol listed! It was way too long for the car so we had to cut and weld part of the piping. Even then the canister had no more room to slide back and it was still poking out from behind the car. The hole tip was sitting way behind the rear bumper. Even if we could have got the tip to sit flush it would have still come into constant with the bumper. Horrible, we had to use the exhaust system without the tip and cut and weld in order to make it work!
EPosted by (Hyattsville, MD) /
1997 Honda Del Sol
Was this review helpful for you? Yes
5 of 5
Nice!
Looks and sounds good, not as loud as I expected but still worth the price!
TPosted by (Whiteland, IN) /
2003 Dodge Ram
Was this review helpful for you? Yes
5 of 5
Easy Installation
Easy Installation and great sound.
DPosted by (Buckeye, AZ) /
2014 Chevy Camaro
Was this review helpful for you? Yes
4.3 of 5
New Exhaust System for 1971 Doge Charger
The product installed very easily and impressed with the overall product.
MPosted by (Massillon, OH) /
1971 Dodge Charger
Was this review helpful for you? Yes
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Flowmaster® - American Thunder™ Stainless Steel Cat-Back Exhaust System (Dual Rear Exit)Flowmaster® - American Thunder™ Exhaust System    $248.97 - $1,025.97
4.553 reviews
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