NGK BMR4A SOLID Standard Nickel Plug

NGK (4004) BMR4A SOLID Standard Spark Plug, Pack of 1 98% pure copper core increases heat dissipation for more reliable starts and prevents spark plug from overheating High-grade alumina silicate ceramic insulator for superior strength and heat transfer Cold-rolled threads to prevent cross-threading and damage to cylinder heads Trivalent plating eliminates need for anti-seize and corrugated ribs prevent flashover Quantity: 1 per package Solid terminal nut Solid Terminal Nut Insulators constructed from 99 percent pure alumina silicate Solid core offers superior heat dissipation and conductivity Corrugated ribs prevent flash over