Vibrant Performance Oxygen Sensor Bung Saddle Style Weld-On 18 mm x 1.50 Oxygen Sensor Bung - Saddle Style - Weld-On - 18 mm x 1.50 in Female Threads - Stainless - Natural - Each Increase your engine's efficiency with Vibrant - Oxygen Sensor Bung Saddle Style Weld-On 18 mm x 1.50. Designed with durable stainless steel and featuring female threads, this oxygen sensor bung is the perfect addition to your vehicle. Weld it on with ease and enjoy increased performance and fuel efficiency.