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Flowmaster 818121 American Thunder Axle-Back Exhaust System Stainless Single Exit

  • Based on 10 reviews
Condition: New
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$425.67 Why this price?

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Availability: Only 5 left in stock, order soon!
Fulfilled by 4Wheel Online

Arrives Oct 3 – Oct 4
Order within 5 hours and 42 minutes
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Features

  • Flowmaster 818121 American Thunder Axle-Back Exhaust System Stainless Single Exit

Description

Flowmaster 818121 American Thunder Axle-Back Exhaust System Stainless Single Exit

Item Package Dimensions L x W x H: ‎40.98 x 21.5 x 11.5 inches


Package Weight: ‎12179 Grams


Item Dimensions LxWxH: ‎41 x 21.5 x 11.5 inches


Item Weight: ‎26.9 Pounds


Brand Name: ‎Flowmaster


Warranty Description: ‎Warranty


Model Name: ‎Flowmaster 818121 American Thunder Axle-Back Exhaust System Stainless Single Exit


Color: ‎No Color


Material: ‎plastic


Suggested Users: ‎unisex-adult


Number of Items: ‎1


Manufacturer: ‎FLOWMASTER


Part Number: ‎717890


Included Components: ‎Flowmaster 818121 American Thunder Axle-Back Exhaust System Stainless Single Exit


Size: ‎One Size


Date First Available: April 4, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 3 – Oct 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Great sound
Not too loud. Easy to install. Slight modification to the bracket to fit my 2023 bronco. Does not hang low like the stock muffler.
Reviewed in the United States on May 17, 2023 by T

  • Just what the bronco needed
The oem ehxaust is extremely anemic. I have a 22' manual and wanted somethign that could give the truck some character and this exhaust does the job. The tone is not aggressive at all, absolutely no drone what so ever at any speed and it gives the Bronco some much needed guts. Volume is a 4-5, oem 2. Even a few minor gurgles and pops on deceleration. Couldn't be happier. The install is not complicated but the instructions are not intuitve at all. Oddly the hardest part from my experience was placing the stop washers at the end. they are tough to place but will go on eventuall. Highly recommended. ... show more
Reviewed in the United States on June 17, 2023 by christian

  • Good sound, bad hangers.
Ultimately I like this axle back kit. It tucks up nicely, sounds decent, and is about the cheapest option out there. That said, the mounts are terrible. It’s obvious what Flowmaster intended with the design and parts provided but it just didn’t line up on my truck. And I broke 3 of the 4 cheap metal clips just trying to install them on to the hangers. I ended up tapping everything to 1/2-13 and installing top lock nuts to retain the red bushings instead. Do better Flowmaster. ... show more
Reviewed in the United States on June 23, 2023 by BEN BEN

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