NGK R6252K-105 2741 Spark Plug Racing R6252K105

The NGK R6252K-105 is a conventional nickel-alloy spark plug in the NGK Standard range, with a copper-cored centre electrode.

The copper core carries heat away from the firing tip quickly, allowing the plug to run cooler under load while burning off deposits at low speed. It resists overheating and fouling better than a plain nickel plug. The plug is easy to inspect and re-gap, and has triple-seal construction against gas leakage plus a corrugated insulator to prevent flashover.