HKS Rotary Applications M-Series Spark Plugs Heat Range 10.5

These HKS M-Series spark plugs are specifically designed for rotary engines, featuring a heat range of 10.5. This heat range is crucial for optimal performance and longevity in the unique combustion environment of a rotary powerplant.

The M-Series plugs are built with a durable center electrode, designed to withstand the high temperatures and pressures characteristic of rotary operation. Their construction aims to provide a consistent spark, which is essential for smooth engine operation and efficient fuel combustion. Proper heat range selection helps prevent fouling during low-speed driving and avoids pre-ignition under heavy load.