Engineered with a 12 mm thread and integrated flutes, this spark plug thread restorer cleans dirty or damaged threads on Harley-Davidson TwinCam, V-Rod, and Sportster models. The design includes a lead-in for alignment and flutes that provide relief for dirt and metal chips during the restoration process. It provides dual drive options through a 5/8" (15.9 mm) hexagon with an o-ring for spark plug sockets or a female 3/8" (9.5 mm) square drive for direct tool attachment.

Engineered with a 12 mm thread and integrated flutes, this spark plug thread restorer cleans dirty or damaged threads on Harley-Davidson TwinCam, V-Rod, and Sportster models. The design includes a lead-in for alignment and flutes that provide relief for dirt and metal chips during the restoration process. It provides dual drive options through a 5/8" (15.9 mm) hexagon with an o-ring for spark plug sockets or a female 3/8" (9.5 mm) square drive for direct tool attachment.