Iridium Long Life Spark Plug

The DENSO SK20R11 Iridium Long Life Spark Plug offers extended service intervals and reliable performance. It is factory-installed by automakers such as GM, Toyota, Honda, and Mitsubishi on luxury vehicles, indicating its original equipment quality. The spark plug features a 0.7mm iridium-tipped, laser-welded fine wire center electrode paired with a platinum-tipped ground electrode for enhanced durability and ignition efficiency. Construction details include a purified alumina powder insulator, which provides exceptional strength and thermal conductivity, crucial for consistent performance under varying engine conditions. A five-rib insulator design is implemented to prevent flashover, ensuring a clean and powerful spark. Each plug is 100% pre-fired to guarantee the highest quality and reliable performance right out of the box. Key specifications for the SK20R11 include a 14mm thread diameter, 1.25mm thread pitch, and a 19mm (3/4") reach with a gasket seat type. The hex size is 5/8" (16mm), and it features a solid terminal type. The center electrode is made of iridium with a fine wire, projected design, while the ground electrode is standard platinum with a quantity of one. The plug is a resistor type, rated at 5k Ohm. Recommended torque specifications are 26-30 lb. ft. for cast iron and 15-22 lb. ft. for aluminum cylinder heads. This spark plug is designed for longevity, with an expected lifespan of 80,000-100,000 miles. The warranty period is 12 months. It is compatible with a wide range of vehicles from 2006 to 2012, including various Lexus, Scion, Toyota, and Volvo models, among others. Consult the detailed fitment guide for specific year, make, model, and engine compatibility.