Spark plug with built-in pressure sensor

Spark plug with built-in resistor

Spark plug with center electrode and surrounding ground...

Spark plug with center electrode having high heat...

Spark plug with center electrode having variable diameter portio

Spark plug with central electrode attachment member containing p

Spark plug with combined surface and air spark paths

Spark plug with copper cored ground electrode and a process of w

Spark plug with counterelectrode having plural apertures in flat

Spark plug with creepage spark gap

Spark plug with easy-to-recognize identification marks

Spark plug with easy-to-recognize identification marks

Spark plug with electrode including precious metal

Spark plug with electrodes having noble metal inserts

Spark plug with engine cylinder pressure sensor

Spark plug with enlarged center electrode and gap

Spark plug with excellent impact resistance conductive seal,...

Spark plug with fine wire ground electrode

Spark plug with glaze and marking

Spark plug with glaze coating