GlowShift’s 1” Tall Wideband Weld-In Bung is designed for ideal fitment on the surface of your exhaust system when you’re installing your o2 sensor. Being extended 1" versus the standard 1/2” bung, the length and design allows the oxygen sensor to sit flush with the exhaust causing less restriction and also extends the life of the sensor by allowing less exhaust temperature exposure. The overall result is a seamless and more effective installation of your O2 sensor, which can be extremely beneficial in a wide range of uses including high horsepower applications. Made from high-quality 304 stainless steel, this wideband o2 bung has a thread size of 18mm x 1.5mm which is standard with most oxygen sensors. GlowShift includes lifetime tech support and a one-year limited warranty with each wideband o2 sensor bung purchase.