HKS Rotary Applications M-Series Spark Plugs Heat Range 10.5

HKS M-Series spark plugs are high-performance Iridium plugs designed to provide improved ignition performance, durability, and anti-carbon build-up. They feature a 0.6mm Iridium Alloy Center Electrode, an Outer Electrode with a Platinum Chip for enhanced durability, a shortened and tapered outer electrode design for anti-vibration, and a Thermal Edge and Spark Support Gap to prevent carbon deposits. The RE-type is specially designed for rotary engines, featuring a straight-shape platinum outer electrode for reliable ignition. These plugs are suitable for both highly tuned and stock engines, offering improved ignition performance under harsh conditions like lean mixture or high boost pressure.