Collection: Weld Bungs & Oxygen Sensor Fittings

Add oxygen sensors and wideband monitoring exactly where your build needs them with high-quality O2 sensor bungs and weld fittings. Designed for custom exhaust, header, downpipe, and turbo fabrication, these fittings provide a secure threaded mounting point for factory and aftermarket oxygen sensors. Shop weld-in bungs, angled sensor fittings, bung plugs, and stainless or mild steel options for EFI conversions, wideband air/fuel monitoring, tuning setups, and custom fabrication projects.