Denso Iridium Racing Spark PLug – 5310

The Denso IK22 (Part No. 5310) is a premium, high-performance aftermarket spark plug widely used in modified, turbocharged, and high-output engines. It features a world-record \(0.4\text{mm}\) iridium center electrode and a tapered U-groove ground electrode, maximizing ignitability while requiring less voltage