NGK Laser Platinum Spark Plug Box of 4 (PMR8C-H)

The pure alumina silicate ceramic insulator in these NGK Laser Platinum spark plugs is a key feature, offering both superior strength and better heat transfer away from the firing tip. This helps prevent overheating, which is crucial for reliable starts and consistent performance, especially in demanding applications. These are designed as an OE equivalent replacement, meaning they're built to meet the original specifications for your vehicle.

Compared to standard nickel plugs, the Laser Platinum design uses a platinum pad on the ground electrode, which helps ensure even wear in modern distributorless ignition systems. This dual platinum surface is laser welded, contributing to a slow wear rate that translates into stable idling, better resistance to fouling, improved fuel efficiency, and lower emissions. The trivalent metal plating on the threads also provides excellent resistance to corrosion and seizing, making installation and future removal easier.

This set includes four spark plugs, which is the correct amount for your Maserati Quattroporte. The copper core within the insulator aids in heat removal, and the triple seals are there to prevent any leaks. If your vehicle originally came with fine wire platinum alloy plugs, these NGK Laser Platinum plugs are a recommended replacement.