Stainless Steel O2 Sensor Bung Plug - M18 x 1.5
525900
The Stainless Steel O2 Sensor Bung Plug provides a simple, reliable solution for sealing unused oxygen sensor ports in custom exhaust systems. Designed for standard M18 x 1.5 threaded O2 sensor bungs, this plug helps prevent exhaust leaks when an oxygen sensor is removed or no longer required. Its stainless steel construction provides corrosion resistance and durability in high-temperature exhaust environments.
Ideal for LS and LT engine swaps, custom headers, rock crawlers, race cars, and performance exhaust fabrication, this O2 bung plug allows unused sensor ports to be sealed without welding the opening shut. Whether completing an EFI conversion, modifying an exhaust system, or temporarily removing a wideband sensor, the threaded design provides a removable, serviceable solution.
Includes:
- (1) Stainless Steel O2 Sensor Bung Plug
Specifications
| Product Type | O2 Sensor Bung Plug |
|---|---|
| Material | Stainless Steel |
| Thread Size | M18 x 1.5 |
| Thread Type | Metric / Male |
| Application | Unused Oxygen Sensor Port Sealing |
| Installation Type | Thread-In |
| Bung Compatibility | M18 x 1.5 Female O2 Sensor Bungs |
| Corrosion Resistance | Stainless Steel Construction |
| Exhaust Compatibility | Compatible Threaded Mild Steel & Stainless Steel Exhaust Bungs |
| Primary Application | Custom Exhaust Fabrication, Oxygen Sensor Port Sealing & EFI Modifications |
| Quantity | (1) Plug |
Fitment
Universal application for compatible exhaust systems equipped with M18 x 1.5 threaded oxygen sensor bungs.
Common Applications:
- GM LS & LT Engine Swap Exhaust Systems
- Custom Headers & Exhaust Collectors
- Aftermarket EFI & Engine Management Installations
- Unused Wideband O2 Sensor Ports
- Rock Crawlers & Rock Bouncers
- Ultra4 & Off-Road Race Vehicles
- Street Cars, Trucks & Performance Builds
- Custom Exhaust Fabrication & Repair
Fitment & Installation Notes:
- Fits compatible M18 x 1.5 female-threaded oxygen sensor bungs.
- Can be used with compatible mild steel or stainless steel weld-in bungs.
- Verify thread size before installation.
- Inspect bung threads and sealing surfaces for damage.
- Ensure the plug is properly seated and sealed to prevent exhaust leaks.
- Allows the oxygen sensor port to be reopened for future sensor installation.
- Not compatible with oxygen sensor ports using different thread sizes.
Builder Note: When fabricating a custom exhaust system, installing an extra O2 sensor bung provides flexibility for future tuning or diagnostics. A removable stainless steel bung plug keeps the unused port sealed while allowing a wideband sensor to be installed later without modifying the exhaust tubing.
FAQ
What size O2 sensor bung does this plug fit?
This plug is designed for standard M18 x 1.5 female-threaded oxygen sensor bungs commonly used in factory and aftermarket exhaust systems.
Can I use this plug after removing a wideband O2 sensor?
Yes. If the wideband sensor uses an M18 x 1.5 threaded bung, this plug can seal the opening when the sensor is removed.
Will this O2 bung plug work with LS and LT exhaust systems?
Yes. It is compatible with LS and LT exhaust systems equipped with standard M18 x 1.5 oxygen sensor ports. Verify the installed bung thread size before ordering.
Why choose a stainless steel O2 sensor bung plug?
Stainless steel provides corrosion resistance and durability in exhaust environments exposed to heat, moisture, and road debris. It is suitable for compatible mild steel and stainless steel exhaust bungs.
Can this plug be removed for future oxygen sensor installation?
Yes. The threaded design allows the plug to be removed when an oxygen sensor is needed for EFI tuning, diagnostics, or air/fuel ratio monitoring.
Does this plug require welding?
No. The plug threads into an existing compatible O2 sensor bung. Welding is only required when installing a new weld-in bung into the exhaust system.
