The AC Delco Conventional Spark Plugs R43TS6 are high-quality spark plugs designed for gasoline engines. These spark plugs, made by ACDelco Professional, are a pack of 4 and are suitable for maintaining secondary ignition systems in cars and trucks. With a focus on reliable performance and durability, these spark plugs are a crucial component in ensuring smooth and efficient engine operation. Perfect for those looking to replace worn-out spark plugs or upgrade to a trusted brand like ACDelco. Surface rust