Ace Race Parts 74005 M18 x 1.5 O2 Sensor Bung - Saddle Style - CP2 TitaniumAce Race Parts 74005 M18 x 1. 5 O2 Sensor Bung Saddle Style CP2 Titanium CP2 TITANIUM O2 SENSOR BUNG M18 X 1. 5 THREAD SADDLE STYLE The Ace Race Parts brand of metric Oxygen (O2) Sensor Bungs is precision machined using CP2 Titanium material and work with all standard O2 Sensors that use a M18 x 1. 5 thread. This specific O2 sensor bung fitting is a Saddle Style Bung. Ace Race Parts O2 sensor bungs are high quality CP2 Titanium options for custom