Lambda O2 sensor Bung plug / (12mm stainless steel)

Sold as singles or choose quantity 2 for twin cylinders.

Come with sealing copper ring.

These are required when deciding to remove your stock 12mm O2 sensors. This would be in a situation where Rottweiler Performance Fueling Dongles or a Powercommander V is being used and the stock narrow band O2's have been rendered unused. Made of Stainless Steel so no concerns with rust.