ISR Performance Weld-On O2 Bung

This ISR Performance weld-on O2 bung is made from steel, giving you a solid base to weld into custom exhaust systems. It's designed to accept a standard oxygen sensor, allowing you to properly monitor your engine's air-fuel ratio after fabrication work. The bung features a common 18mm x 1.5mm thread pitch, which is what most factory and aftermarket O2 sensors use.

When you're building a custom exhaust, whether it's for a turbo kit, a header swap, or just to reroute piping, you'll often need to add a new port for your oxygen sensor. This bung provides that port. You'll need to weld it into your exhaust tubing at the correct angle and location to ensure the sensor reads accurately. It's a straightforward part that does exactly what it's supposed to do: give you a place to screw in your O2 sensor.