Made from 316 stainless steel, our simple 4.75mm adaptor is intended to easily mount the commonly used LSU 4.2 wideband O2 sensor in your 4AG's factory oxygen sensor location. 
A new gasket is included.  The barely visible occamotif logo is for the eagle-eyed: try and find it.
*International customers, please contact us for a quote for additional shipping costs.