Vance and Hines 18mm Oxygen Sensor Plugs - Harley-Davidson
About Vance and Hines
Vance & Hines has been building motorcycle exhaust since 1979 and has run factory-backed drag and King of the Baggers programs that feed straight back into its street products. Systems like the Torquer and the 2-into-1 designs are engineered around real dyno work, not just sound — which is why they show up on so many tuned Milwaukee-Eight and Twin Cam builds.
These Vance and Hines oxygen sensor plugs are designed to seal off unused O2 sensor ports in Harley-Davidson exhaust systems. When you remove a sensor or modify your exhaust, these plugs ensure a complete, leak-free seal.
Why riders pick this
- Seals unused 18mm O2 sensor ports on Harley exhausts
- Zinc-plated hex-head design
- 18mm x 1.5 thread pitch for precise fit
- Copper sealing washers create a gas-tight seal
- Prevents exhaust leaks and maintains system integrity
For Harley-Davidson riders who are changing exhaust systems or removing oxygen sensors, these Vance and Hines 18mm sensor plugs are a critical component. Each two-pack includes durable zinc-plated hex-head plugs paired with copper sealing washers, ensuring a robust and leak-proof seal for standard 18mm sensor holes. This prevents exhaust gas escape and maintains the proper back pressure in your system.
Essential for Exhaust System Integrity
- Two zinc-plated hex-head plugs included
- Features an 18mm x 1.5 thread pitch for direct fitment
- Comes with copper sealing washers for a secure seal
- Designed for any Harley-Davidson with 18mm O2 sensor ports
Maintain Performance and Clean Aesthetics
Leaving unused O2 sensor ports open can lead to exhaust leaks, which can impact engine performance and create an unwanted noise. These Vance and Hines plugs provide a clean, professional finish to your exhaust system, sealing off those ports effectively. They are an essential item for any exhaust modification, ensuring your V-twin runs as intended while looking its best.
Specifications
- Brand: Vance & Hines
- Manufacturer Part #: 16925
- Quantity: 2 plugs per pack
- Thread Size: 18mm x 1.5
- Weight: 0.16 lb
- Category: Exhaust Adapters
Common questions
What is the purpose of these O2 sensor plugs?
These Vance and Hines plugs are used to securely seal off any unused oxygen sensor ports on your Harley-Davidson exhaust system, preventing exhaust leaks and maintaining proper back pressure when a sensor is removed.
How do I know if these plugs will fit my Harley?
These plugs are designed for Harley-Davidson models with standard 18mm O2 sensor ports. You should confirm the size of your exhaust's O2 sensor holes before making a purchase.
Are copper washers necessary for a good seal?
Yes, the included copper sealing washers are crucial. They compress when the plug is torqued down, creating a tight, leak-free seal against the exhaust pipe, which is essential for proper exhaust function.
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 | Vance and Hines |
| TYPE | Exhaust Adapters |
| SKU | T14-612260 |
| WEIGHT | 0.16 lb |
