Constructed from durable T304 stainless steel, this J-Style oxygen sensor weld bung features a female 18mm x 1.5 thread for standard O2 sensor compatibility. The J-shaped design helps protect the sensor element from excessive exhaust heat, making it ideal for performance and turbocharged applications. Designed for welding into exhaust systems, it ensures a secure, leak-free installation while extending sensor life. Sold individually.