TMBR MOTO Stainless Steel M12 x 1.25mm O2 Sensor Bung Plug and Crush Washer for Motorcycle Exhaust Systems

The O2 Sensor Bung Plug and Crush Washer is a simple but essential component for sealing unused sensor ports on your exhaust system. Precision-machined and threaded for a secure fit, this plug ensures proper exhaust back pressure and prevents leaks when an oxygen (O2) sensor (or temperature sensor) is not installed.

Whether you’re running aftermarket exhaust components, tuning with or without sensors, or need to temporarily block off a bung, this plug is a simple and reliable solution.

Fitment Note:

• Confirm fitment for your header pipe specifically. Not all exhaust brands use the same sensor bung. For exhaust systems that might have been built with racing in mind, the larger M18x1.5mm plugs are more likely. Some brands are going to the smaller M12x1.25mm bungs that will only accommodate the OEM sensor. In those cases, you will need the smaller plug.

Features:

• Designed to seal unused sensor bungs (O2 or temperature sensor ports).

• Precision-machined for a leak-free fit.

• Durable construction for heat and vibration resistance.

• Easy to install or remove as needed.

• Compact design — carry as a spare if swapping setups on trips.

• 12 × 1.25 mm thread / 6mm hex drive

• Includes 1 crush washer - REPLACEMENT CRUSH WASHER