Sold as singles or choose quantity 2 for twin cylinders.
Comes with sealing copper ring
These are required when deciding to remove your stock 18mm 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 there are no concerns of rust.
