Heat Sink O2 Sensor Weld Bung

The Heat Sink O2 Sensor Weld Bung from Vibrant Performance is a precision-engineered oxygen sensor bung designed for welding directly into custom exhaust systems and headers. This component serves as a mounting point for oxygen sensors in aftermarket and performance exhaust builds where factory bungs are absent or incompatible. Exhaust technicians, performance tuners, and custom fabricators rely on this bung to establish proper sensor placement for lambda monitoring and engine control module feedback on turbocharged, naturally aspirated, and modified vehicles.

Constructed from stainless steel for corrosion resistance and thermal durability, the Heat Sink O2 Sensor Weld Bung features an 18 mm diameter body with a 1.50 inch female thread port designed to accept standard O2 sensors without adapters. The weld-on design allows for permanent integration into exhaust piping, headers, or custom manifolds through direct arc or MIG welding, ensuring a solid mechanical and thermal connection. The stainless construction dissipates heat effectively while protecting sensor threads from thermal damage and fouling, critical for maintaining accurate engine diagnostics and emissions compliance in high-temperature exhaust environments.

This bung is ideal for custom exhaust fabrication, turbo installations, header upgrades, and engine swaps where oxygen sensor placement must be integrated during assembly rather than relying on OEM provisions. Installation requires welding equipment and basic exhaust fabrication skill; the 1.50 inch thread depth accommodates most aftermarket and OEM oxygen sensors with standard 18 mm threads. Whether you're building a full custom exhaust system, installing a performance header, or upgrading a modified engine platform, the Heat Sink O2 Sensor Weld Bung provides a reliable, thermally stable sensor mounting solution.