The Bosch Automotive Super 4 504 WR 78 X spark plugs offer original equipment manufacturer quality and are specifically designed for use in vehicles. These spark plugs feature innovative alloys and an optimized electrode geometry that ensure ideal ignition characteristics. They are designed to provide optimal dielectric strength and have improved heat dissipation properties that prevent overheating. Additionally, they minimize the risk of pre-ignition and fouling, leading to a longer lifespan and reliability. The package includes four spark plugs that are characterized by their durability and efficiency. These spark plugs are an excellent choice for vehicle owners who value quality and performance.