NGK - Racing Spark Plug for Universal use (R5671A-7)

To withstand the severe conditions that occur in racing engines, NGK Racing Spark Plugs feature electrode materials and configurations as follows:

• Electrode materials - Many use precious metals such as platinum or gold/palladium for greater durability and lower voltage requirements.
• Electrode configurations - Fine-wire center electrodes provide better sparking and enhanced ignitability. Fine-wire ground electrodes further improve the ignitability of the plug.
• Ensulator configurations - Special configurations are used for the insulator noses to improve throttle response.
• 14mm x 3/4 in. Reach
• 5/8 in. Hex
• Gasket seat
• V-groove center electrode