NGK NTK PRE CAT PRIMARY O2 LAMBDA OXYGEN SENSOR | HONDA CIVIC EP3 TYPE R K20The NTK logo and brand should be immediately recognisable and is synonymic to NGK. This is because NTK is a sister company to NGK, specialising in electronic parts such as Lambda sensors, MAF (mass air flow) sensors, as well as engine position and speed sensors. NTK is the worlds largest supplier and manufacturer of original equipment oxygen sensors. Precision manufactured to the highest quality and durability. This sensor is a replacement for the pre