Bikers Choice O2 Sensor Bung Plug 18mm x 1.5 and 12mm x 1.25

Bikers Choice O2 Sensor Bung Plug 18mm x 1.5 and 12mm x 1.25

When converting to a carbureted exhaust setup or running non-EFI pipes on a Harley-Davidson, any open O2 sensor port becomes a source of exhaust leaks and an unfinished appearance. These plugs thread directly into unused bungs and seal them completely, keeping exhaust flow controlled and the engine bay looking clean from header to tailpipe.

Key Features

• Seals unused O2 sensor ports on non-EFI exhaust systems
• Available in two thread sizes: 18mm x 1.5 and 12mm x 1.25
• Sold individually — select the size that matches your exhaust bung
• Chrome-plated finish for heat resistance and a clean appearance

Technical Specifications

• Thread Sizes: 18mm x 1.5 and 12mm x 1.25
• Finish: Chrome-plated
• Quantity: Sold individually

Fitment Notes

• Designed for use with non-EFI carbureted exhaust systems with open O2 sensor ports
• Select the thread size that matches your exhaust bung before ordering
• The 18mm x 1.5 size fits standard O2 sensor ports found on most aftermarket exhaust systems
• The 12mm x 1.25 size fits smaller O2 sensor ports found on select aftermarket systems