Driven Racing Honda Grom Engine Plug - Small Driven Racing Honda Grom Small Engine Plug manufactured using high grade 6061 billet aluminum and anodized for superior corrosion resistance! Available in Black, Blue, Gold, Red & Silver. Manufactured in the USA. High Grade 6061 Anodized AluminumAvailable in Black, Blue, Gold, Red & SilverThread Size: M14x1.50Overall Outer Diameter: 22mmMade in USA