NGK® 4091 - Racing™ Spark Plug (R5671A-7) - Pack Of 4 Plugs UK Stock
Corrugated Ribs Prevent Flashover. NGK Spark Plugs has been igniting sparks since the 1930s. However, sparks don’t just simply ignite. NGK Racing Spark Plugs are designed for use in engines that have been fine-tuned to achieve maximum power.