Cobra 909-Twins 4" Chrome Slip-On Mufflers - Harley Softail Fat Boy
About Cobra
Cobra USA builds exhaust, sissy bars, luggage racks and bolt-on styling parts for cruisers and baggers, with a catalog aimed at the rider who wants a finished, matched look rather than a one-off fabrication. Its slip-ons and full systems are designed around factory mounting points for a straightforward bolt-on install.
Give your 2018-2025 Harley Softail Fat Boy a classic V-twin sound and brilliant chrome finish with Cobra 909-Twins 4" slip-on mufflers. These mufflers feature a 2.25" perforated core for that traditional Harley tone, while the downward-angle profile ensures a clean and stealthy look on your bike. They are designed for a straightforward bolt-on installation.
Why riders pick this
- Authentic Harley V-twin sound from a 2.25" core
- Durable, brilliant chrome finish
- Clean, scalloped twin-tip design
- Downward-angled exit for a stealthy look
- 50-state street legal and EPA compliant
The Cobra 909-Twins 4" chrome slip-on mufflers are crafted for Softail Fat Boy riders who appreciate both classic style and an enhanced exhaust note. The brilliant chrome finish provides a timeless custom aesthetic, while the scalloped twin-tip design cleverly hides external fasteners, contributing to a smooth and intentional appearance. These slip-ons are a direct replacement for your factory mufflers, offering an immediate upgrade.
Classic V-Twin Tone and Chrome Finish
- Traditional Harley V-twin sound from a 2.25" perforated core
- Brilliant chrome finish for a timeless custom look
- Scalloped twin-tip design with no visible external hardware
- Downward-angled profile for a clean, stealthy appearance
- 50-state street legal and EPA compliant
Effortless Upgrade, Lasting Performance
These Cobra 909-Twins slip-ons deliver a significant sound improvement over stock while adhering to 50-state legal requirements. While they are designed to perform well with a stock tune, adding a fuel management system can further optimize your bike's performance, especially if you plan on additional engine modifications. Always confirm fitment for your specific Harley-Davidson Softail Fat Boy model before purchasing.
Specifications
- Brand: Cobra
- Manufacturer Part #: 6520
- Length: 33.5 in
- Width: 8 in
- Height: 5.25 in
- Weight: 12.03 lbs
- Country of Origin: USA
Common questions
Will these fit my 2017 or earlier Fat Boy?
No, these Cobra 909-Twins slip-ons are specifically engineered for 2018-2025 Harley-Davidson Softail Fat Boy models. Older Fat Boys require a different part number due to exhaust routing differences.
Are these 50 State legal?
Yes, this configuration meets EPA emissions and noise standards, making it 50-state legal for use across the United States.
What sound do I get with the 2.25" core?
The 2.25" perforated core delivers a traditional, recognizable Harley tone – a good presence that's richer than stock but not overly aggressive, perfect for daily riding.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Cobra |
| TYPE | Exhaust |
| SKU | 82-96073 |
| WEIGHT | 12.03 lb |
