Moroso 22734 Oxygen Sensor Bung Plug

The Moroso 22734 oxygen sensor bung plug is designed to seal off unused oxygen sensor ports in exhaust headers, manifolds, and exhaust systems. This essential plug prevents exhaust leaks and maintains proper backpressure when an oxygen sensor bung is present but not in use.

Key Features:

• Seals unused oxygen sensor bungs to prevent exhaust leaks
• Standard 18mm x 1.5 thread pitch fits most O2 sensor ports
• Steel construction withstands high exhaust temperatures
• Ideal for race applications, engine swaps, or custom exhaust fabrication
• Prevents contaminants from entering the exhaust system

This plug is commonly used when switching to a carburetor setup, running custom exhaust systems without oxygen sensors, or temporarily plugging sensor bungs during engine development. The durable steel construction ensures a reliable seal even under extreme heat and vibration conditions.