Flowmaster® - American Thunder™ Exhaust System

60 reviews|Item # sp25
$119.97 - $1,236.76
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Product Details

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.

Features:

  • High Quality Performance Sound
  • Increases Torque and Power
  • Mandrel Bent 16 Gauge Stainless Steel Tubing and Stainless Steel Muffler Assembly
  • Includes Hangers and Hardware for Easy Installation
  • Every System Tuned on Dynamometer

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.

Warranty

Lifetime Limited Warranty applies to Flowmaster stainless steel mufflers, stainless steel exhaust systems, stainless steel pipes and other stainless steel exhaust accessories (except exhaust tips).

Three (3) Year Limited Warranty applies to Flowmaster aluminized steel mufflers, aluminized steel exhaust systems, aluminized steel pipes, exhaust tips and other non-race exhaust accessories.

One (1) Year Limited Warranty applies to Elite Series exhaust headers. Flowmaster, Inc. (“Flowmaster”) extends the following limited warranty to the original purchaser of its mufflers, exhaust systems, pipes, exhaust tips, headers and other non-race accessories (hereafter “products”), excluding catalytic converters sold under the Flowmaster® brand.

This catalytic converter is warranted to be free from defects in materials and workmanship subject to the exclusion and conditions set forth below and subject to the durational limits in this paragraph.

EPA Catalytic Converter Warranty: The stainless steel body and the nipples alone are warranted for 5 years or 50,000 miles, whichever comes first. At the conclusion of the 5 year/50,000 mile or 25,000 mile period, whichever is applicable, all liability under this limited warranty shall terminate.

CARB Catalytic Converter Warranty: This catalytic converter has been designed and manufactured and is warranted to meet California Air Resources Board emission requirements for 50,000 miles. The stainless steel body and the nipples alone are warranted for 5 years or 50,000 miles, whichever comes first. At the conclusion of the 5 year/50,000 miles on stainless steel body and nipples or 50,000 miles on catalyst substrate, whichever is applicable, all liability under this limited warranty shall terminate.

Flowmaster warrants the products mentioned above against defects in materials and workmanship for the period set forth below, when they are owned by the original purchaser and remain installed on the vehicle on which they were originally installed. This warranty is void if the product was not installed properly on the vehicle, was installed on a vehicle for which it was not designed, or was removed from the vehicle on which it was originally installed and reinstalled on another vehicle. This warranty shall not apply to normal wear, cosmetic issues such as coatings and material discoloration, any product that was installed on a racing vehicle, installed improperly or contrary to Flowmaster instructions, altered, misused, repaired, damaged from an accident, collision, undercarriage road impact or debris, or willful or negligent act.

The warranty set forth herein for Flowmaster® stainless steel mufflers, stainless steel exhaust systems, stainless steel pipes and other stainless steel exhaust accessories (except exhaust tips) extends for a period of the life of the original vehicle the product was installed on. The warranty set forth herein for Flowmaster aluminized steel mufflers, aluminized steel exhaust systems, aluminized steel pipes, all exhaust tips and non-race exhaust accessories and commercial applications of aluminized steel products or stainless steel products extends for a period of three (3) years from the date of original purchase and the original vehicle it was installed on. The warranty set forth herein for Flowmaster exhaust headers extends for a period of one (1) year from the date of original purchase and the original vehicle it was installed on. Header warranty does not cover damages caused by exhaust insulating wrap, and is void if the product was installed on a new or rebuilt engine during the initial break-in period.

This warranty is not contingent upon the purchaser’s completion of the Warranty Registration Form found on the Flowmaster® website. If however the purchaser completes and submits that form at the time of purchase, Flowmaster will keep that form on file which may serve as an aid in determining warranty coverage in the event of the loss of the original purchase receipt.

Flowmaster’s liability is expressly limited to the replacement of the product or refund of the purchase price as described herein. Flowmaster® shall have no liability for the cost of installation or removal of the defective product, the cost of labor or any additional parts required to complete the installation of the replacement product, towing or transportation costs, or return shipping costs. In no event shall Flowmaster be liable for any direct, indirect, special, incidental or consequential losses and/or damages, including but not limited to interruption of business or loss of business or loss of profit or damage to related components resulting from the use of or inability to use the product, or any breach of warranty or any defect in the product, even if Flowmaster shall have been advised of the possibility of such potential losses or damages. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights. You may also have other rights which may vary from state to state.

The warranties set forth herein are exclusive and unless otherwise required by applicable law no other warranties are made by Flowmaster® or are authorized to be made with respect to the product.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Reviews

(60)

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 Dual Cat-Back Exhaust System
Flowmaster® - American Thunder™ Exhaust System
Average Rating: 4.6 of 5
4.3 of 5
Flowmaster America Thunder Dual Cat-Back Exhaust System
The product itself is awesome. Fits perfectly. Problem is once you start installation you realize all the cross over piping is missing. And the tailpipes screws will not tighten enough to prevent them from rattling or falling off, they had to be welded on to stop the aforementioned. And to manufacture my own crossover piping to complete installation.
Posted by (Debary, FL) / 2004 Dodge Ram
Was this review helpful for you? Yes
5 of 5
Sounds Great
Works great.
Posted by (Union, CT) / 2018 Ram 2500
Was this review helpful for you? Yes
5 of 5
3rd American Thunder/Force 2 Installed
Howdy this is the third kit install this month, install is extremely simple. Most of your time is spent pulling the old pipe out if you don't just cut it at the muffler. The sound is awesome on the American 40's muffler inside and out. The force 2 50's muffler is all but silent inside the truck, that said it still sounds good on the out side when you rev.
Posted by (Buda, TX) / 2018 Chevy Silverado
Was this review helpful for you? Yes
4.5 of 5
Dodge Challenger - American Thunder
Works quite well, a little louder at lighter throttles in traffic than expected but when opened up sounds good. Sounds much better at idle. Too early to say if the performance or economy have changed. In summary now sounds like a performance V6 engine rather than an almost silent V6 with the typical Japanese silent soundtrack.
Posted by (Chelmsford, ESS) / 2016 Dodge Challenger
Was this review helpful for you? Yes
4.8 of 5
Great Product
It's a very quality piece the only problem, I had was that they didn't fit in the hangers right and they slide out out I could of ordered the wrong one.
Posted by (Rawlins, WY) / 2002 Chevy Silverado
Was this review helpful for you? Yes
5 of 5
Flowmaster
This exhaust looks and sounds great. Performs exactly as advertised.
Posted by (Huntington Beach, CA) / 2006 Toyota Tundra
Was this review helpful for you? Yes
4.5 of 5
Awesome Sound
Was delivered super fast, had some questions on install called CARiD, they walked me thru it great service will continue to buy from them.
Posted by (Bristow, VA) /
Was this review helpful for you? Yes
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.
Posted 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.
Posted 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.
Posted by (Beaverton, OR) / 2013 Scion FR-S
Was this review helpful for you? Yes
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