Clamp-On Exhaust Wideband Oxygen Sensor Bung Adapter – No Welding Needed (2.5" & 3")

The ProFlow Exhaust Clamp-On Wideband O2 Bung Adapter is the ultimate solution for enthusiasts and tuners who need to add an oxygen sensor mounting point without the cost or hassle of welding. Whether you are running a 2.5-inch or 3-inch exhaust system, this adapter provides a professional-grade, leak-free seal in minutes. Specifically engineered for precision tuning, this no-weld bung is perfect for temporary diagnostic testing, air-fuel ratio (AFR) monitoring, or permanent installations on stainless steel systems where welding is difficult. Key Performance Features Dual-Size Compatibility: Precision-contoured to provide a flush, secure fit on both 2.5" (63mm) and 3" (76mm) outer diameter (OD) exhaust piping. Universal M18 x 1.5 Thread: Fits all standard wideband and narrowband sensors, including Bosch LSU 4.9, AEM, Innovate, and more. Corrosion-Resistant Stainless Steel: Built to withstand extreme under-car heat and road salt, ensuring the threads won't seize or rust over time. Why Choose a Clamp-On Bung? DIY Friendly: No specialized welding equipment or professional shop labor required. If you can use a drill and a socket set, you can install this. Protect Your Exhaust: Avoid the heat-stress, warping, and potential rust points created by traditional welding on thin-walled aluminized or stainless piping. Versatile & Reversible: Ideal for tuners who need to move a wideband sensor between multiple vehicles or for owners who want a reversible modification. Technical Specifications Feature Specification Compatible Pipe Sizes 2.5" and 3" OD Thread Pitch M18 x 1.5 Material Heavy-Duty Stainless Steel Included in Kit Bung Adapter, High-Temp Gasket, Stainless Clamps Installation Tip for Best Accuracy For optimal performance, mount your O2 sensor at a 10 to 45-degree angle above the horizontal plane. This prevents moisture and condensation from settling inside the sensor housing, significantly extending the life of your wideband sensor.