NGK Single Iridium Spark Plug Box of 4 (UR45IX)

NGK is well-known for making reliable ignition components, and their Iridium IX spark plugs are a popular choice for drivers looking to get more out of their engine. These plugs are designed to provide a more consistent and powerful spark, which can lead to improved acceleration and better fuel efficiency. They are built with a fine iridium tip, known for its durability and ability to maintain a sharp edge over time, ensuring a consistent spark even in demanding conditions.

The iridium alloy used in the center electrode has a very high melting point, making it well-suited for the high temperatures found in modern engines. This construction also helps with anti-fouling, meaning the plug is less likely to get fouled by carbon deposits, leading to smoother idling and better throttle response. The tapered cut on the ground electrode further aids in starting and idling performance. These plugs fit a wide range of vehicles, including many from American Motors, Buick, Chevrolet, and Ford models from the 1970s through the 1990s.