The NGK 9259 Spark Plug Wire Set RC-HE56 is a high-quality ignition wire set designed for 4-cylinder engines. Made with high-temperature silicone material, these wires are built to withstand extreme heat and ensure reliable ignition performance. With a male connector type and manufactured in Japan by NGK, a trusted brand in the automotive industry, this spark plug wire set is a dependable choice for your vehicle's ignition system. Additionally, this product comes with a California Prop 65 Warning due to its material composition, making it a safe and informed choice for car enthusiasts.