The patented DENSO Iridium Long Life Spark Plug is the first automotive plug to utilize iridium and is fast becoming the standard for modern high-tech engines. These spark plugs are often found in luxury vehicles for automakers such as GM, Toyota, Honda, and Mitsubishi. Employing a revolutionary new 360-degree laser-welding process, DENSO has created a spark plug unlike anything on the market today. With this in mind, if your vehicle exhibits bad spark plug symptoms including slow acceleration, poor fuel economy, or engine misfires, consider DENSO for your performance spark plug replacement. Trust in the iridium-spark-plug pioneer to provide spark plugs that showcase unmatched functionality, reliability, and fitment.

• ENHANCE PERFORMANCE: the Iridium Long Life design with its 360-degree laser weld is designed for durability under the most extreme conditions. The iridium alloy is six times harder and eight times stronger than conventional platinum and can handle the temperatures over 4,000 degrees Fahrenheit associated with high-performance ignition and special fuel systems such as turbo, supercharger, and nitrous systems
• MAXIMIZE SERVICE LIFE: the Iridium Long Life Spark Plug sustains spark performance for over 100,000 miles
• OPT FOR FASTER STARTS: the DENSO Iridium Long Life Spark Plug has a smaller center electrode, which dramatically improves ignitability for better conservation of fuel, more power, fewer misfires under heavy loads, and faster, easier starts
• FIGHT CORROSION: the DENSO Iridium Long Life design, which resists corrosion even in the harshest environments, delivers sustained spark performance and lasts up to three times as long as conventional plugs
• SAVE ON FUEL: the Iridium Long Life Spark Plug design has a tapered cut to reduce quenching and improve firing performance for more efficient emission gas purification and fuel consumption