NGK Iridium IX Performance Spark Plugs 3689

The Next Generation of Plug. The Iridium IX is the next generation of spark plug technology. Using proven rare metals and introducing new precision crafted designs, the Iridium IX delivers a precisely manufactured center electrode that is not too fine and not too thick. The result is a plug that is both exceptionally durable and powerful. Get the plugs that are designed for those that expect the best, by the best - NGK.

Out-Performs Other Iridium Plugs. Other Iridium plugs use thicker wires than NGK's Iridium IX series, meaning the IX series doesn't need as much voltage to create a spark. Less voltage means less strain on your ignition system and more power - and their fine wire design also reduces fouling and improves the plugs' ability to spark in high compression, high revving engines. It also starts easier even in the coldest temperatures - meaning this plug is the best choice for everything from your everyday work truck to your track-only, modified sports truck.

Rare Metal Construction. 6 times harder than platinum, and both more rare and stronger than any other metal - iridium is the best choice when it comes to your plugs. Iridium's unique propertie are what allow NGK to make this plug so accurate. And with its incredibly high melting point, iridium is the best choice for any high performance engine.

OEM Quality. NGK is one of the premier manufacturers of spark plugs worldwide. All NGK plugs are made with a solid copper core for greater spark and heat transfer. Plus they use a triple gasket sealing process to eliminate the potential for combustion gas to leak back through the shell - superior to other manufacturer's one or two shell design. And their double dipped zinc chromate shell is designed for maximum corrosion and rust resistance.