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Flowmaster 818121 American Thunder Axle-Back Exhaust System

(2021-2025 Ford Bronco)

Part of: Flowmaster American Thunder Axle-Back Exhaust System

Other options in this family: Flowmaster 817942 Flowmaster 818162 Flowmaster 817746 Flowmaster 817460 Flowmaster 17421

Manufacturer

Picture for manufacturer Flowmaster

Part Number

818121
8 reviews
Sale Price

$549.95

2 left at this price

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Flowmaster American Thunder Axle-Back Exhaust System delivers enhanced performance and aggressive sound without interior drone. Engineered with Flowmaster's patented Delta Flow technology, this system optimizes exhaust flow to increase horsepower and torque while maintaining a refined driving experience.

Key Features:

  • Delta Flow technology maximizes performance and eliminates cabin drone
  • 3.00-inch mandrel-bent 16-gauge 409 stainless steel tubing for superior exhaust flow and durability
  • Polished 3.00-inch stainless steel tips for a premium custom appearance
  • Factory-styled hangers mount in stock locations for straightforward bolt-on installation
  • Complete hardware kit included for hassle-free installation
  • Backed by Flowmaster's Lifetime Limited Warranty

This axle-back system replaces your factory exhaust from the rear axle to the bumper, providing an aggressive exhaust note and performance gains while maintaining excellent fitment with OE-quality construction. The mandrel-bent tubing ensures smooth, unrestricted flow throughout the system.

Products specifications

Fits

2021-2025 Ford Bronco

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

California Proposition 65 Chemical Name

Nickel (Metallic)

California Proposition 65 Chemical Name

Chromium (hexavalent compounds)

Exhaust Type

Axle-Back

Exit Position

Single Rear

Material

409 Stainless Steel

Brand

Flowmaster

Catalytic Converter Quantity

0

Category

Exhaust

Clamping Type

Flat Band

Clamps Included

Yes

Emission Code

5

Exhaust Series

American Thunder

Exhaust Tip Color

Silver

Exhaust Tip Connection

Welded

Exhaust Tip Cut

Angled

Exhaust Tip Edge

Slash Cut

Exhaust Tip Finish

Polished

Exhaust Tip Intercooled

No

Exhaust Tip Length

4.75

Exhaust Tip Material

304 Stainless Steel

Exhaust Tip Quantity

1

Exhaust Tip Resonated

No

Exhaust Tip Shape

Round

Exhaust Tip Wall

Single Wall

Exit Style

Single Out Rear

Finish

Painted

Fitment

2 and 4-Door

Gasket Or Seal Included

No

Grade Type

Performance

Hangers Included

Yes

Inlet Type

Clamp-On

Mount Type

Uses New Hangers (Included)

Mounting Bracket Included

Yes

Muffler Body Material

409 Stainless Steel

Muffler Body Shape

Oval

Muffler Color

Black

Muffler Finish

Black High-Temperature Paint Finish

Muffler Flanged Inlet

No

Muffler Flanged Outlet

No

Muffler Inlet Connection

Slip-Fit

Muffler Inlet Location

Center

Muffler Outlet Location

Offset

Muffler Outlet Quantity

1

muffler part number

Kit Only

Muffler Quantity

1

Muffler Series

60 Series

Muffler Type

Reflection

Pipe Color

Silver

Pipe Material

409 Stainless Steel

Product Type

Exhaust System

Sound Level

Aggressive / Moderate

Spring Bolt Kit Included

No

Sub Category

Exhaust and Tail Pipes

Tail Pipe Quantity

Single

Tail Pipe Quantity

1

Tail Pipe Tapered Outlet

No

Tip Logo

Embossed

Tip Style

Single wall

Type

Axle-Back

Valve Included

No

Valve Type

Not Applicable

Warning

California Proposition 65

Give better confirmation emails

all good on price and ordering

Exceeded my expectations!

I think the shopping experience was great. Now we will see how the shipping experience is! Thank you. I wish we could’ve had a coupon or a discount with this purchase. Maybe you could let us know if we can get one for this purchase?

They met all my expectations, which isn't a simple thing to do. I will visit the site again for future purchases.

Easy order , quick delivery

Easy peasy

Very satisfied and received exact product sooner than expected

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