Help
X

Need Help?

We've got you covered!

877-216-5446
Sales & Service Hours
X

Sales & Service Hours

Customer Service

  • Monday to Friday: 7am - 6pm CST
  • Saturday: Closed
  • Sunday: Closed

Returns

  • Monday to Friday: 7am - 6pm CST
  • Saturday: Closed
  • Sunday: Closed

Sales

  • Monday to Friday: 7am - 10pm CST
  • Saturday: 8am - 8pm CST
  • Sunday: 8am - 10pm CST

Flowmaster American Thunder Exhaust System

What Do You Drive? We Will Tell You If It Fits.
Fits your
Change
Product Information
List Price:
$334.65 - $1,519.27
Our Price:
$255.97 - $1,299.97
Made in the USA
Rating:
4.7 (75 reviews)

Description

  • Constructed out of 16-gauge stainless steel
  • Mandrel bent tubing for maximum flow
  • Tested and proven on dyno to increase performance
  • No drilling or welding on most models
  • Limited lifetime warranty
  • Made in the USA - Santa Rosa, CA

Let's face it you love your truck or muscle car and you want it to be noticed and running at its best. Flowmaster American Thunder exhaust systems are one of the best out there with a great sound and power enhancing performance.

Everyone wants their exhaust to sound great, but first things first – it has to boost your engine's performance. Flowmaster exhaust systems are going to allow your engine to more easily emit exhaust fumes by optimizing the travel from engine to tip. Reduce back-pressure and you boost power. Boost power and you go faster.

How does Flowmaster create such great sound from their exhaust kits you ask? The sound is created by a muffler that is manufactured for not just that great "Flowmaster Sound" but for optimal power and mileage. Every exhaust is perfectly designed to work the best with your ride.

The Flowmaster American Thunder exhaust systems come with an aggressive sound. Tubing is constructed out of 16-gauge stainless steel. Each truck and car exhaust system is mandrel bent for an even flow and exit. Flowmaster exhaust systems come complete with muffler, hangers, clamps and tip for easier installation.

Customize your car, truck, or SUV the way you want with application offering a single or dual exit exhaust kit. So what are you waiting for? Get yourself the Flowmaster American Thunder exhaust system today!

View Available Part Numbers For This Product Line

Videos

Watch This Video2011 Dodge Dakota - Flowmaster Force II Cat-back Exhaust System - PN 817520
(01:20)
Watch This VideoFlowmaster American Thunder Cat-back System - 2014-2017 Silverado / Sierra 1500 - PN: 817669
(01:46)
Watch This VideoFlowmaster American Thunder Cat-back 2011-2017 Chevy/GMC Silverado & Sierra 1500 w/ 6.2L V8-817602
(00:55)
Watch This VideoFlowmaster American Thunder Cat-back Exhaust System 2015-2017 Ford F150 3.5L Ecoboost - 817725
(00:58)
Watch This VideoFlowmaster American Thunder Cat-back Exhaust System 2015-2017 Ford F150 3.5L TiVCT - 817725
(01:00)
Watch This VideoFlowmaster American Thunder Cat-back Exhaust System 2009-2017 Toyota Tundra - 817664
(01:19)
Watch This VideoFlowmaster American Thunder Cat-back Exhaust for 2003-2012 Dodge Ram 2500 and 3500 Trucks - 817507
(00:44)
Watch This VideoFlowmaster American Thunder Cat-back Exhaust System 09-14 F-150 4.6L, 5.0L, 5.4L - 817567
(00:49)
Watch This VideoFlowmaster American Thunder Cat-back Exhaust System 2014-2016 Ram 2500 - 817709
(01:00)
Watch This VideoFlowmaster American Thunder Cat-back Exhaust System for 2016 - 2017 Toyota Tacoma 3.5L V6 - 817719
(00:47)
Watch This VideoFlowmaster American Thunder Cat-back System - 10-14 Ford F-150 SVT Raptor 6.2L - 817551
(01:08)
Watch This VideoFlowmaster American Thunder Cat-back System - 13-15 Toyota Tacoma - 817614
(01:08)
Watch This VideoFlowmaster American Thunder Cat-Back System - 2007-2013 Silverado/Sierra 1500 5.3L - PN 817680
(01:16)
Watch This VideoFlowmaster American Thunder Cat-back System - 2011-2016 GM 2500HD & 3500HD - 817541
(01:24)


Review

Product Reviews Summary

Overall
4.7 
Appearance
4.1
Price / Value
3.8
Ease of Installation
3.9
Quality
3.9
75  Customer Reviews
5 Star
61   
4 Star
12   
3 Star
1   
2 Star
0   
1 Star
1   
Order by

Part #: FLM-817523 Posted on
Was this review helpful?
5.0
- 2008 Chevy Silverado 1500 (Erie, PA)
Appearance
Price / Value
Ease of Installation
Quality
Part #: FLM-817477 Posted on
Was this review helpful?
5.0
(Tarawa Terrace, NC)
Appearance
Price / Value
Ease of Installation
Quality
Part #: FLM-17362 Posted on
Was this review helpful?
1.0
- 1999 Chevy Silverado 1500 (Caledonia, MN)
Duel exhaust sounds great.
Part #: FLM-817492 Posted on
Was this review helpful?
5.0
- Chevy Silverado 1500 (Honeoye, NY)
Appearance
Price / Value
Ease of Installation
Quality
The installation was not as easy as I was expecting. The exhaust pipe was to long according to the installation instructions. After parcel assembly and disassembly several times I ended up removing 5 1/2 inches from the exhaust pipe. After the installation was complete I was unable the tighten the clamps tight enough to stop the system from shifting. To resolve this problem I had to weld all joints. I finally got everything where I was happy with it. The sound is what I wanted.
Decent rumble Ram 1500
Part #: FLM-817477 Posted on
Was this review helpful?
4.0
- 2016 Ram Truck 1500 (Robesonia, PA)
Appearance
Price / Value
Ease of Installation
Quality
Installed this on my Hemi Ram 1500. It has a decent rumble at idle and a good growl at low rpms. When you get on the pedal the volume is decent. I like the fact that if your on the highway cruising it doesn't drone in the cab. Overall a good product. If you want aggressive sound while on the gas this is for you. If you want all out loudness go with the outlaw series. It is a bit more agressive.
Part #: FLM-817642 Posted on
Was this review helpful?
5.0
(Lancaster, CA)
Appearance
Price / Value
Ease of Installation
Quality
Part #: FLM-817706 Posted on
Was this review helpful?
5.0
- 2011 Chevy Silverado 1500 (Brookville, PA)
Great sound, bad engineering
Part #: FLM-817725 Posted on
Was this review helpful?
5.0
- 2016 Ford F150 (Naples, FL)
Appearance
Price / Value
Ease of Installation
Quality
This exhaust sounds great but the bands that hold it all together are terrible. Leaks air like crazy and ended up paying $80 more to have it welded.... Be prepared to have this done. Once its welded it sounds awesome and please with sound! Prob would have it fabrivated with same muffler for $200-300 cheaper next time. Just my two cents!
Part #: FLM-817697 Posted on
Was this review helpful?
5.0
- 2015 Chevy Camaro (Ozark, MO)
Appearance
Price / Value
Ease of Installation
Quality
ORDER was shipped on time, quality was great and the ease of how everything fit was right on mark, overall the experience was a 5 thanks.
2009 FORD
Part #: FLM-817478 Posted on
Was this review helpful?
5.0
- 2009 Ford F150 (SAN ANTONIO, TX)
Appearance
Price / Value
Ease of Installation
They sound great. Instillation was easy and everything fit. The only problem was with the clamps! Had the same problem others has talked about. Clamps would not tighten enough to hold pipes secure. Used a impact wrench and bottomed out the threads and they still would not hold. After taking them off three times finally gave up trying to make them work went and bought regular muffler clamps. The ones they send are not cheep clamps but just will not compress the split on the end of the pipe. I'm 70 yo and installed them by myself on the ground (no lift) The hard part is trying to get the old tail pipe out without cutting it. If your on a lift no problem. I finally cut it to get it out. Other then the clamp problem a smooth and simple install. Watch the video of the installation before hand its on their site.
Page
 Top

Warranty

Lifetime Warranty SS / 3 Year Warranty Aluminum

Flowmaster is offering a lifetime limited warranty on their stainless steel exhaust systems and a 3 year limited warranty on the aluminized steel exhausts. The warranty protects you against manufacturing defects in material and workmanship. If you have any questions please call our customer service team at 1-877-216-5446.

PDF Icon Flowmaster Product Warranty

Installation

Flowmaster American Thunder exhuast systems can be installed right at home, if you've got the right tools and equipment. All orders include installation instructions, and those are also available on our website. Welding may be required on some exhaust systems. For additional information please call our customer service team at 1-877-216-5446.