THIS CROSS REFERENCE TABLE IS INFORMATIVE ONLY.
DUE TO DIFFERENCES IN DESIGN AND MATERIALS THE SPARK PLUGS OF VARIOUS MANUFACTURERS DO NOT HAVE EXACTLY THE SAME HEAT RANGE.
Equipment for racing cars is highly individualized and requires much experience in the choice of the best spark plug heat range. Engine compression, boost pressure, air-fuel ratio, timing and other variables play major roles in the selection of an appropriate spark plug heat range. A wrong decision can lead to serious engine damage. Please consult unclear cases with an expert or the producer of the spark plug. Any damages, implied or consequential caused by improper choice of a spark plug cannot be claimed against the importer or producer of the spark plug.