Premium Oxygen Sensor Bung

This Bung is specifically designed to provide maximum protection for the Bosch LSU 4.9 and ADV sensor while minimizing exhaust restriction by only exposing the tip of the sensor to the exhaust stream. Bosch LSU sensors employ the venturi effect at the tip of the sensor to drive gas into the sensor measurement chamber, this Bung does not interfere with the venturi effect. Made of stainless steel with a tapered end to help with welding.