21-26 Ford Bronco 2.3L/2.7L Flowmaster 818121 American Thunder Axle-Back Exhaust System

Flowmaster American Thunder Axle-Back Exhaust System - Part Number 818121

The Flowmaster American Thunder Axle-Back Exhaust System (Part Number 818121) is engineered for 2021-2026 Ford Bronco models equipped with the 2.3L or 2.7L EcoBoost engine, delivering an ideal balance of everyday comfort and aggressive performance. Designed for drivers seeking a deep performance exhaust note without unwanted interior drone, this axle-back system features Flowmaster's proven 60 Series muffler with Delta Flow Technology to provide a mild tone during cruising and idle while producing an aggressive exhaust sound under acceleration. Constructed from durable mandrel-bent 16-gauge 409 stainless steel tubing, the system is built to maximize exhaust flow, improve durability, and enhance overall performance. Dyno testing recorded gains of up to 19 horsepower and 19 lb-ft of torque at the rear wheels, while the polished 3.00-inch stainless steel exhaust tip adds a clean, custom appearance. Using factory mounting locations and including all necessary installation hardware, this performance exhaust offers an easy upgrade backed by Flowmaster's Lifetime Limited Warranty.

Key Features

• Designed for 2021-2026 Ford Bronco models with 2.3L and 2.7L EcoBoost engines.
• American Thunder axle-back exhaust system with single rear exit.
• Tuned 60 Series style muffler delivers an aggressive to moderate exhaust tone.
• Delta Flow Technology helps increase performance while reducing interior drone.
• No-drone design provides comfortable daily driving.
• Maximum dyno-tested gains of up to 19 horsepower and 19 lb-ft of torque at the rear wheels.
• Mandrel-bent 3.00-inch 16-gauge 409 stainless steel tubing maximizes exhaust flow and durability.
• 3.00-inch polished 304 stainless steel exhaust tip adds a custom appearance.
• Complete hardware and factory-style hangers included.
• Installs using factory mounting locations.
• Backed by Flowmaster's Lifetime Limited Warranty.

Benefits

• Enhances exhaust sound with an aggressive tone under throttle while maintaining a refined sound during cruising.
• Improves exhaust flow for increased engine performance.
• Provides a comfortable driving experience with reduced exhaust drone.
• Premium stainless steel construction offers long-lasting durability and corrosion resistance.
• Polished exhaust tip enhances the Bronco's rear appearance with a performance-inspired finish.
• Direct-fit design simplifies installation without extensive modifications.
• Supported by Flowmaster's Lifetime Limited Warranty for long-term confidence.
  

Product Specifications

• Part Number: 818121
• Brand: Flowmaster
• Product Type: Axle-Back Exhaust System
• Exhaust Series: American Thunder
• Exit Style: Single Out Rear (2-Door and 4-Door)
• Main Piping Diameter: 3.00 inches
• Pipe Material: 16-Gauge 409 Stainless Steel
• Pipe Color: Silver
• Muffler Series: 60 Series
• Muffler Type: Reflection
• Muffler Material: 409 Stainless Steel
• Muffler Finish: Black High-Temperature Paint
• Muffler Color: Black
• Muffler Shape: Oval
• Muffler Dimensions: 13.50 in. Length x 10.00 in. Width x 5.00 in. Height
• Muffler Overall Length: 34.00 inches
• Muffler Inlet: 3.00-inch Slip-Fit, Center Inlet
• Muffler Outlet: 3.00-inch Offset Outlet
• Exhaust Tip Diameter: 3.00 inches
• Exhaust Tip Material: 304 Stainless Steel
• Exhaust Tip Finish: Polished
• Exhaust Tip Shape: Round
• Exhaust Tip Style: Angled Slash Cut, Single Wall
• Exhaust Tip Length: 4.75 inches
• Exhaust Tip Color: Silver
• Tip Logo: Embossed
• Tail Pipe Quantity: 1
• Clamps Included: Yes
• Clamping Type: Flat Band
• Hangers Included: Yes
• Mounting Bracket Included: Yes
• Mount Type: Uses New Hangers (Included)
• Catalytic Converter Included: No
• Sound Level: Aggressive / Moderate
• Finish: Painted
• California Proposition 65: Yes
• CARB (California) Compliant: Yes

Install Difficulty Level

Easy. This direct-fit axle-back exhaust system is designed to utilize the factory mounting locations and includes all required hardware and factory-style hangers for a straightforward installation. With basic hand tools, installation can be completed in as little as 30 minutes, making it an excellent upgrade for both experienced enthusiasts and first-time installers.

Vehicle Fitment

Fits:

• 2021-2026 Ford Bronco 2.3L EcoBoost
• 2021-2026 Ford Bronco 2.7L EcoBoost
• Fits 2-wheel drive and 4-wheel drive models.
• Fits both 2-door and 4-door models.

If there are any questions about this product or to report product description inaccuracies, contact the MPT Performance experts at (407) 636-7077 or by email.