Collection: Iridium Spark Plugs

Iridium Spark Plugs — Maximum Longevity & Performance

Iridium spark plugs represent the pinnacle of ignition technology. Featuring an ultra-fine iridium center electrode — often just 0.4 to 0.6 mm in diameter — these plugs require less voltage to fire, reduce electrode wear, and deliver a sharper, more consistent spark across every RPM range. The result is better throttle response, smoother idle, improved cold-start reliability, and service intervals stretching to 100,000 miles or more.

If you drive a turbocharged, supercharged, or high-compression engine, iridium plugs are the go-to choice. They handle extreme heat and pressure without the electrode erosion that limits copper and standard platinum designs. Many modern vehicles come factory-equipped with iridium plugs — replacing them in-kind is the correct service approach.

Leading Iridium Spark Plug Brands

• NGK Iridium IX and Laser Iridium — the gold standard in iridium technology, used by Honda, Toyota, Subaru, and dozens of other OEMs as original equipment
• Champion Iridium — reliable long-life iridium plugs that meet or exceed OE specifications at a competitive price point

Not sure which plug type is right for your vehicle? Browse our full spark plugs collection to compare copper, platinum, and iridium options side by side. Iridium costs a bit more upfront, but the extended replacement interval and performance benefits make it the smarter long-term investment for most drivers.