The DR8EA SPARK PLUG (86-7162) consists of a highly pure alumina silicate insulator that provides exceptional dielectric and raw endurance. The combination of sophisticated ceramic characteristics and a triple gasket sealing method substantially precludes the risk of combustion gas leaking back through the shell. The shell is coated twice with a robust, corrosion-resistant zinc chromate coating for optimal rust resistance and has a solid copper core for better spark and heat transfer. The overall material used is of higher quality, resulting in longer life and better performance. Key Features: Alumina silicate insulators made from 99 percent pure alumina The heat dissipation and conductivity of a solid copper core are superior. The anti-corrosion and anti-seizing capabilities of trivalent metal plating are unrivaled. Ceramic insulator made entirely of pure alumina silicate, which offers higher strength and heat transfer. Three seals keep the water out. Threads are cold-rolled to prevent cross-threading and cylinder head damage. Specifications: SKU: 86-7162 Weight: 1.00 LBS UPC: 087295071625Brand: Autowares Condition: New