Elevate your engine's performance with the Champion L87YC 312 Copper Plus Spark Plug, a reliable replacement for your gasoline-powered vehicle. Designed to meet the demands of everyday driving, this spark plug features a standard configuration and a 14 mm thread diameter, ensuring a secure fit and optimal conductivity. With a 12V voltage rating and a 12.7 mm installation depth, the Champion L87YC 312 is crafted to deliver consistent sparks for smooth combustion. Its hex size of 13/16 in facilitates easy installation, while the plug's vintage part status adds authenticity. Proudly made in the United States, this spark plug does not compromise on quality or efficiency. Exact item set is shown. New old stock with partial original packaging. Gap: 0.9 mm. Thread diameter: 14mm. Thread reach: 12.7mm. Seat type: flat. Hex size: 21mm. Set weight 9 oz. Made in USA. Please review our business policies in our store for information regarding returns, shipping and warranties.