Flowmaster Outlaw Axle-Back Exhaust System - 2021-2025 Ford Bronco 2.3L/2.7L | SKU: 818120
Flowmaster Outlaw Axle-Back Exhaust System - 2021-2025 Ford Bronco 2.3L/2.7L | SKU: 818120
Overview
The Flowmaster Outlaw Series Axle-Back Exhaust System for the 2021–2025 Ford Bronco 2.3L and 2.7L EcoBoost delivers an aggressive, race-inspired exhaust note without sacrificing street drivability. Engineered specifically for Bronco owners who demand maximum sound and a bold aesthetic upgrade, this axle-back system is one of the loudest and most performance-focused solutions in Flowmaster's lineup. Bolt directly onto your Bronco's factory exhaust with no cutting or welding required for a straightforward, high-impact upgrade.
Key Features & Benefits
- Outlaw Series Sound Profile – Flowmaster's most aggressive exhaust note in their lineup; produces a deep, throaty, race-inspired tone that turns heads on and off the trail.
- Mandrel-Bent Stainless Steel Construction – 409S stainless steel tubing maintains consistent inner diameter throughout each bend, maximizing exhaust flow and long-term corrosion resistance.
- Direct Bolt-On Fitment – Engineered to replace OEM axle-back components with precision-matched flanges and hardware; no cutting, welding, or fabrication required.
- Performance-Tuned Muffler Delete Design – Minimal restriction design maximizes exhaust scavenging for improved throttle response and a more free-flowing system.
- Polished Stainless Steel Tips – Aggressive tip styling complements the Bronco's rugged exterior for a premium, finished look.
- Dual-Exit Configuration – Enhances the visual profile of the rear end while optimizing exhaust gas evacuation.
- Compatible with 2-Door & 4-Door Bronco – Verified fitment across both popular Bronco body styles equipped with the 2.3L EcoBoost 4-cylinder and 2.7L EcoBoost V6 engines.
- Flowmaster Lifetime Limited Warranty – Backed by Flowmaster's confidence in their materials and craftsmanship with a lifetime limited warranty against defects.
What's Included
- Outlaw Series muffler assembly (pre-welded to intermediate pipe section)
- Polished stainless steel exhaust tip(s)
- OEM-match exhaust flanges and hardware kit
- Rubber exhaust hangers / isolators
- Flowmaster installation instructions
Specifications
| Manufacturer Part Number | 818120 |
|---|---|
| Brand | Flowmaster |
| Series | Outlaw |
| System Type | Axle-Back |
| Inlet Diameter | Matches OEM (see fitment notes) |
| Tip Style | Polished Stainless Steel |
| Pipe Material | 409S Stainless Steel |
| Sound Level | Very Aggressive / Outlaw |
| Installation Type | Bolt-On (No Cutting or Welding) |
| Emissions Compliance | Not CARB compliant; legal for off-highway use only in California |
| Warranty | Flowmaster Lifetime Limited Warranty |
| UPC | 090127140277 |
| SKU | flo818120 |
Fitment & Compatibility
This Flowmaster Outlaw Axle-Back Exhaust System (Part #818120) is designed to fit the following vehicles:
- 2021–2025 Ford Bronco – 2.3L EcoBoost 4-Cylinder (2-Door & 4-Door)
- 2021–2025 Ford Bronco – 2.7L EcoBoost V6 (2-Door & 4-Door)
Always verify your specific build date, trim level, and factory exhaust configuration before purchasing. This system is designed to replace the factory axle-back section from the rear axle rearward. It is not intended for use on the Ford Bronco Sport.
Installation
The Flowmaster Outlaw Axle-Back system is a bolt-on replacement designed for straightforward installation using basic hand tools. The system utilizes factory hanger locations and OEM-style flange connections, making it suitable for experienced DIY enthusiasts. Most installations can be completed in 1–2 hours on a vehicle lift or with proper jack stands. Flowmaster recommends allowing the factory exhaust to cool completely before beginning work. Professional installation is recommended if you are unfamiliar with exhaust system service.
Frequently Asked Questions
- Is the Flowmaster Outlaw 818120 CARB compliant?
- No. The Outlaw Series is not CARB (California Air Resources Board) compliant and is intended for off-highway or competition use only in California. It is street legal in all other U.S. states, though local ordinances may apply.
- Will this fit both 2-door and 4-door Ford Bronco models?
- Yes, Part #818120 is engineered to fit both the 2-door and 4-door 2021–2025 Ford Bronco with either the 2.3L or 2.7L EcoBoost engine.
- Does this system require any cutting or welding?
- No. This is a true bolt-on system that connects using existing factory flanges and hanger locations — no cutting or welding is needed.
- What does the Outlaw Series sound like on a Ford Bronco?
- The Outlaw Series produces Flowmaster's most aggressive exhaust tone — a loud, deep, race-inspired sound both at idle and under acceleration. It is significantly louder than stock and louder than Flowmaster's American Thunder or Force II series.
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California Proposition 65 Warning
⚠️ WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer, and or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
