NGK Sparkplugs2238Spark plugsNGK Sparkplugs 2238 V-Power Advanced V-groove center electrode provides optimum performance and fuel efficiency required by today's lean-burning engines. NGK Sparkplugs 2238 V-Power Features: OEM-Approved Design V-Groove Design Enhances Ignitability More Complete Combustion and Lower Emissions Racer's Choice for Performance