⚡ Ignite Your Adventure with ACDelco! Vehicle-specific fit for seamless installation. Replace all plugs simultaneously for peak efficiency. Manufactured by AC Delco, a name synonymous with quality. Copper core design ensures reliable ignition every time. Engineered for optimal performance with a nickel alloy tip. Copper core Nickel alloy tip Ribbed suppressor seal The ACDelco MR43LTS Specialty Marine Spark Plug is designed for durability and performance, featuring a nickel alloy tip, copper core, and ribbed suppressor seal. Ideal for marine engines, this spark plug ensures reliable ignition and is vehicle-specific for a perfect fit. Replace your old plugs for enhanced engine efficiency and trust in AC Delco's quality.