The Aeroflow Performance line of premium quality weld-in bungs and caps are specifically designed to suit Exhaust Gas Temperature (EGT) K-Style sensors. These versatile EGT bungs are designed to be welded on to your exhaust system, providing an adapter for mounting an EGT Compression fitting or probe. They are a 7/16"UNF thread to suit common EGT probes and available in either CS1030 steel or 316 Stainless Steel.