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Flowmaster American Thunder Exhaust System

  • Regular Price: $176.70-1,822.05
  • Our Price: $119.95 - 1,236.95
  • Shipping:FREE SHIPPING
  • Rating: (32)

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  • Get a loud, full volume sound with the Flowmaster American Thunder Exhaust System
  • 5-10% power gains, with a boost in MPG
  • Flowmaster Exhausts are built with Mandrel-bent pipes for maximum flow
  • Includes high-flow, low-drone chambered muffler
  • Built from Aluminized Steel for corrosion resistance
  • Flowmaster hardware and instructions included for easy installation
  • Many kits include stainless steel Flowmaster tip (s)
  • 3-Year Warranty

There's no sound as uniquely American as that of a rumbling exhaust system. And there's no better way to get that awe-inspiring sound than by bolting on a Flowmaster American Thunder Exhaust System. With its mandrel-bent, free-flowing design and high-quality materials, the Flowmaster American Thunder is ready to sing - and bring the power.

The Flowmaster American Thunder Exhaust System is not just designed to give you all sound and no punch. With Flowmaster exhausts, you immediately feel 5-10% more horsepower and a few extra miles per gallon thrown in for good measure. The American Thunder boasts mandrel-bent pipes, chambered mufflers, and custom-engineered designs to achieve huge power gains while tuning in an aggressive, classic exhaust tone. Choose from single or dual exits, at rear or side locations for your Flowmaster exhaust.

Your Flowmaster American Thunder Exhaust System is made entirely with aluminized steel to stand up to rust, and even includes polished Stainless Steel tips for the finished look. Flowmaster, Inc. backs your Flowmaster American Thunder Exhaust System with a 3-Year Warranty.

Flowmaster American Thunder Exhaust System Customer Reviews

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Overall Rating:

4.7 of 5

Average Install Time: 1-2 hours

Showing 10 of 32 reviews. See All Reviews.

who drives a Chevy Silverado
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Flowmaster American Thunder exhaust system is really nice quality and really nice sound. Auto Accessories Garage did a great job getting it to me. I highly recommend both the product and the company.

Install Time: 30-60 minutes

who drives a Chevy Silverado
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I was really impressed in how well the exhaust fit and how well it went together. It sounds great with the headers I have for the truck and I would definitely get another.

Install Time: Under 30 minutes

who drives a Chevy C/K Pickup
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I had a local muffler shop complete the install of my Flowmaster super 44. Great fit and super sound. My truck is looking sharp and sounding even better. Thank you and will be back for my other truck.

Install Time: 2+ Hours

who drives a Ford F150
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Package arrived on time. Simply to hook up.

Install Time: 30-60 minutes

who drives a Ford F150
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The exhaust showed up and was all as advertised. Easily installed and sounds great. Wish I would have purchased sooner.

Install Time: 30-60 minutes

who drives a Toyota Tundra
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Nice system, sound is very nice without being overpowering! Easy install, only issue I had with it was the bolts for the chrome tips either were to soft or needed washers! I broke one of them before it snugged on tail pipe. I got the hardest SS bolts,nuts,& washers from the local ACE store & that worked out well! Would have been 5 star if not for that issue.

Install Time: 1-2 hours

who drives a Chevy Silverado
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System fit well but for the cost it should of included a new clamp for the ball fitting and the clamps on the tips are a joke no way they would hold the tips in place I had to go get new clamps for them for the price you would expect better quality than spot welded tin clamps that brake off with very little pressure.

Install Time: 2+ Hours

who drives a Chevy Monte Carlo
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Very easy to install, form and fit to my g-body car was spot on. Highly recommend, sounds great.

Install Time: 30-60 minutes

who drives a Chevy Silverado
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It was a great product, easy to install, and looks great on my truck.

Install Time: 1-2 hours

who drives a Chevy Silverado
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Better quality than I thought it was going to be. Took longer to install than it should have (broken nuts at cat) rest was pretty good! Tip bolt snapped when tightening! Quieter than last exhaust but a nice low growl.

Install Time: 2+ Hours

Showing 10 of 32 reviews. See All Reviews.