Our product is not a spark plug. It is a photon charger that emits a photon/plasma charge that is radiant blue/white. Please do not incorporate any symbols of fire. An icon that is similar to radiating energy in motion, is symmetrical and easy to reproduce would be great. The text should be strong, masculine, and comfortable being seen on a high performance American ponycar/corvette, a Toyota Prius, a BMW, or a Ferrari. Thank you very much for the great designs so far!