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Flowmaster American Thunder Exhaust System

  • Regular Price: $338.80-1,471.55
  • Our Price: $229.99- 999.00
  • Shipping:FREE SHIPPING

Choose Your Vehicle

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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

Overall:
Performance:
Quality:
Appearance:
4.7
5

Average Install Time: 1-2 hours

who drives a Chevrolet Silverado Pickup
Overall:
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Quality:
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Exhaust is perfect. Exactly what I expected. Fit perfect. Easy to install.

Install Time: 2+ Hours

who drives a Dodge Ram 2500
Overall:
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It was a little more complicated to put on then I thought but overall a good choice

Install Time: 1-2 hours

who drives a Plymouth Roadrunner
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Item received as advertised. prompt shipping and good price

Install Time: 1-2 hours

who drives a Ford Mustang
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Great exhaust! Not too loud but just enough.

Install Time: 30-60 minutes

who drives a Ford F-150
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Performance:
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Amazing improvement. Not too loud when driving conservatively and very impressive when you hammer on the gas.

Install Time: 1-2 hours

who drives a Toyota Tacoma
Overall:
Performance:
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It was easy to install, and I love the aggressive sound my Tacoma makes now. I highly suggest this exhaust.

Install Time: 1-2 hours

who drives a Dodge Ram 2500
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This system came with clear directions and was easy to install. It sounds great, but maybe a little loud inside the cab. I'm happy with it.

Install Time: 2+ Hours

who drives a Toyota Tacoma
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I love my Flowmaster exhaust. It sounds bad ass!

Install Time: 1-2 hours

who drives a Chevrolet C/K Pickup
Overall:
Performance:
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The product came with everything that I needed to install it on my 1998 Chevy K1500. It sounds just right. It doesnt drone you out when you are traveling down the highway, though it dose get a bit louder and deeper when you have to get on the gas a little, say from a headwind or pulling a trailer. I replaced my catalytic converters and air intake at the same time. While I didn't notice much more horsepower, mid-range power seems better. Fuel milage has made a very noticeable difference, thought that may be attributed to the cats. The delivery was fast and free!

Install Time: 1-2 hours

who drives a Chevrolet Silverado Pickup
Overall:
Performance:
Quality:
Appearance:
Quality exhaust, although didn't care of the left side exit, too close to rear end cover & filter plug. Shipping was prompt.

Install Time: 1-2 hours