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Description
Flowmaster American Thunder Axle-Back Exhaust System - 818121Fits 2021 2026 Ford Bronco 2. 3L 2. 7L, American Thunder Axle Back, Single Exit Part Number: 818121 Looking for the perfect balance between a mild tone while cruising and at idle, but aggressive tone under throttle all while having no drone? The American Thunder axle back exhaust system is perfect for the daily driven 2021 2026 Ford Bronco with the 2. 3 or 2. 7 liter engine. This system uses a tuned 60 Series style muffler for an aggressive to
Fits 2021-2026 Ford Bronco 2.3L/2.7L, American Thunder Axle-Back, Single ExitPart Number: 818121
Looking for the perfect balance between a mild tone while cruising and at idle, but aggressive tone under throttle all while having no drone? The American Thunder axle-back exhaust system is perfect for the daily driven 2021-2026 Ford Bronco with the 2.3 or 2.7-liter engine. This system uses a tuned 60 Series style muffler for an aggressive to moderate exhaust tone and increased performance. Maximum dyno gains of 19 hp and 19 lb-ft. were measured at the rear wheels. 3.00-inch mandrel bent 409 stainless steel tubing is used to maximize exhaust flow and durability. A polished 3.00-inch stainless steel tip is used to add a custom look to this iconic vehicle. All of the necessary hardware is included and factory mounting locations are used for an easy installation. Backed by Flowmaster's Lifetime Limited Warranty.
Features and Benefits
• 3.00-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
• A 3.00-inch polished stainless steel tips add a custom look
• No Drone
• Includes complete hardware and factory styled hangers in the stock locations for an easy installation
• Delta Flow Technology Increases Performance and Reduces Drone
• Delta Flow Technology Increases Performance
• Backed by Flowmaster's Lifetime Limited Warranty
2021-2026 Ford Bronco with 2.3L and 2.7L Ecoboost engines. Fits 2 & 4-wheel drive, 2 & 4 Door Models.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.8 ★★★★★
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Product Reviews
★★★★★ 5
Protección!
Exelente!
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Recomendado
Si utilizas un 4.6L Stoker es obligatorio utilizar en cada cambio de aceite.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Hard to find.
Good stuff. Hard to find. It should extend my engine life.
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Reviewed in the United States on April 2, 2026
★★★★★ 4
Great product
Quick delivery.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Use as directed, when needed, and you'll be good to go.
A must have if you have a need for a ZDDP additive. This won't fix your worn valve seats, leaking piston rings, seasonal depression or gout but it will improve the lubricating properties of a quality oil in a properly maintained motor for your longevity goals.
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Reviewed in the United States on February 5, 2026