Platinum Power™ Spark Plug (3436) by Champion®. Iridium Long Life Plug – Patented Iridium Alloy Plug (90% Ir) with Platinum Ground Strap. With a platinum tip welded to a nickel alloy center electrode, these spark plugs provide superior wear characteristics. Combining a thin-wire center electrode with a V-trimmed ground electrode, the plugs create sharp spark focus and less spark scatter for better engine performance compared to a standard plug.