- Fine iridium tip ensures high durability and a consistently stable spark
- Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines
- Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
- Outstanding acceleration, high fuel efficiency and durability
- Ultimate design, technology and performance
- Made in JAPAN

IRIDIUM IX
ULTIMATE PERFORMANCE

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling.

Fine iridium tip ensures high durability and a consistently stable spark
Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines
Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
Outstanding acceleration, high fuel efficiency and durability
Ultimate design, technology and performance

HOW MUCH OF A PERFORMANCE IMPROVEMENT CAN I EXPECT FROM CHANGING PLUGS?
A: A common misconception is that changing spark plugs will result in a large power increase. In most cases, removing even seriously worn out spark plugs will only result in very modest power gains, typically about 1-2% of total engine output. This could be even less for computer-controlled vehicles, primarily because most newer vehicles have more powerful ignition systems and the vehicle's computer can make adjustments so that vehicle operation seems smoother and more seamless.

Many people think that simply supplying more spark to the firing tip can and will combust more fuel. What they don't understand is that most newer car engines are so efficient that they are already burning all of the available fuel. Simply adding more spark voltage can't burn more fuel because there is no more fuel to burn.

When a stock or near-stock engine is given a fresh set of spark plugs, peak efficiency is restored. The power gains that come from this restored state of tune are usually minimal. Any company that tells you that their spark plug will provide significant gains in power in a stock or near-stock engine is making blanket statements that may not be supportable.