NGK Iridium IX Spark Plug Box of 4 (ER8EHIX)

When you're looking to get the most out of your engine, especially if it's been modified or you're aiming for higher performance, upgrading your spark plugs is a smart move. These NGK Iridium IX plugs are built to handle the demands of performance applications, offering a significant step up from standard nickel alloy plugs.

The key here is the fine iridium tip on the center electrode. Iridium is incredibly hard and has a very high melting point, which means it holds up well in high-temperature engines and provides a consistent, strong spark. This translates to better acceleration, improved fuel efficiency, and longer plug life. Plus, the tapered cut on the ground electrode helps with easier starting, smoother idling, and a more responsive throttle. NGK also uses a trivalent metal plating on the shell, which gives it good resistance to corrosion and makes it less likely to seize in the cylinder head during removal.

This set comes with four plugs, which is what most 4-cylinder engines need. If you've got a different cylinder count, you'll want to grab the appropriate number of boxes. These are a solid choice for anyone looking to get more out of their engine's ignition system.