When it comes to maintaining modern ignition systems, parts choices usually come down to two paths: saving a few bucks upfront or buying peace of mind for the next 100,000 miles. NGK Laser Iridium Spark Plugs fall firmly into the second category.

As the factory-installed original equipment (OE) choice for millions of modern vehicles, these premium plugs are built for maximum longevity and factory-spec efficiency. Here is our hands-on breakdown of whether they are worth the premium price tag.