Bungs - O2 Sensor Bungs

The Oxygen Sensor Bungs category at Ace Race Parts includes a wide selection of precision-machined weld-in bungs designed for accurate and reliable oxygen sensor installation across a variety of applications. These bungs are commonly used in exhaust fabrication to accommodate wideband and narrowband O2 sensors for tuning, monitoring, and engine management.

Manufactured from high-quality materials including aluminum, mild steel, stainless steel, and titanium, each bung is CNC machined from solid bar stock to ensure consistent thread accuracy and proper sensor fitment. Available in common metric sizes such as M12 x 1.25 and M18 x 1.5, these bungs are designed to support a wide range of sensor types and configurations.

Each oxygen sensor bung is thoroughly cleaned and individually packaged to maintain cleanliness and thread integrity prior to installation. With multiple material options, sizes, and thread pitches available, these bungs provide the flexibility needed for custom exhaust fabrication across automotive, motorsport, marine, and industrial applications.

Whether you’re adding sensor provisions to a new exhaust system or modifying an existing setup, these weld-in bungs offer a reliable solution for proper sensor placement and long-term durability.