NGK 5123 Standard Spark Plug

The NGK 5123 is a standard copper-core spark plug designed to deliver reliable ignition performance for a wide range of automotive, motorcycle, marine, and small engine applications. As an OE-quality replacement part, this spark plug meets the exacting standards that have made NGK the leading spark plug manufacturer in North America.

Key Features:

• Copper core electrode for superior heat dissipation and conductivity
• Trivalent metal plating provides excellent corrosion and anti-seize properties
• Cold-rolled threads prevent cross-threading and damage to cylinder heads
• Triple gasket seal eliminates combustion gas leakage
• High-grade alumina silicate ceramic insulator for superior strength and heat transfer
• Pure alumina silicate ceramic insulator prevents flashover

NGK standard spark plugs feature a solid copper core that offers excellent heat dissipation characteristics and improved conductivity. The precision manufacturing process ensures consistent performance and reliable ignition across a broad range of operating conditions. Backed by over 80 years of engineering expertise, NGK spark plugs deliver the quality and durability demanded by both OE manufacturers and aftermarket professionals.