The NGK range of plug covers are designed to the same exacting standards as our other world class products. The plug cover has to provide a secure connection between the high tension ignition leads and the spark plug. It has to ensure no current leakage occurs at this connection which will affect engine performance. On many motorcycles for example plug covers are exposed to the elements and the cover must perform perfectly under the most difficult weather conditions.
Plug covers are manufactured to suit many applications and many are of the resistor type which provide electrical noise suppression across all frequencies whilst engine performance is not adversely affected.
For more information on plug covers or to view the current range please click on the NGK Partfinder link at the top of this page. This information is also shown in the printed versions of our spark plug catalogues.