Excited to install these Laser Iridium spark plugs into my car. They're the latest series in NGK OEM lineup of Iridium series. Laser series lasts 80k to 100k miles versus only 40k to 50k in a normal iridium spark plug. These are 6x harder and 8x stronger than platinum. In a V8 engine, these also increase your fuel economy as stated on many websites.