NGK DCPR6E Spark Plug NGK Standard Spark Plugs are proven technology that offer reliable performance. Standard spark plugs are treated with corrosion-resistant plating to ensure ease of installation and removal. The solid copper core offers superior heat dissipation, conductivity and broad heat range. NGK Standard plugs are an OE cornerstone that has provided decades of reliable performance. Stock Number 3481 Resistance Ohm 5k Ground configuration Surface Discharge Ground electrode core material