NGK Single Iridium Spark Plug Box of 4 (LTR5IX-11)

When you're looking to get the most out of your engine, especially if it's been modified or you're aiming for better overall performance, upgrading your spark plugs is a smart move. These NGK Iridium IX spark plugs are built with a fine iridium center electrode, which is significantly harder than platinum, meaning it holds up better over time and maintains a consistent spark. This translates to better acceleration, improved fuel efficiency, and longer life compared to standard nickel alloy plugs.

The design of these plugs includes a tapered cut ground electrode that helps with easier starting, smoother idling, and a more responsive throttle. Plus, they feature trivalent metal plating, which gives them solid protection against corrosion and makes them less likely to seize up when it's time for your next service. NGK is a well-known name in ignition parts, and these Iridium IX plugs are a popular choice for drivers who want a noticeable improvement in how their engine runs.

This box contains four spark plugs, which is what most common 4-cylinder and V6 engines need. They fit a wide range of vehicles, including many Buick, Cadillac, Chevrolet, and Ford models, so check the fitment details to see if they're right for your car.