Bosch has introduced Bosch Platinum Ir Fusion ™, the newest member of the Bosch premium spark plug family. Bosch Platinum Ir Fusion combines an iridium and platinum center electrode with Bosch's exclusive surface air gap technology and yttrium-enhanced ground electrodes to deliver better than OE performance. Bosch's Platinum Ir Fusion is the industry's only spark plug that combines iridium and platinum in a patented fused fine wire center electrode design. This provides a more durable and long lasting center electrode, better heat dissipation, and lower, more stable ignition voltage requirements.