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1x Denso IW27 (5317) Iridium Power Spark Plug

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1x Denso IW27 (5317) Iridium Power Spark Plug

Reference: DSP29

Condition: New product

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Genuine and brand new Denso Spark Plug

Need help confirming fitment?

Click here to use the DENSO part finder tool

You can also email us your vehicles registation number (UK only) or vehicle details, we can then use our database to confirm fitment and which parts you require.

Denso Iridium Power Technology

Fifty million years ago, an asteroid composed almost entirely of the precious metal Iridium (IR-77) struck the earth creating the Gulf of Mexico. From this catastrophe came a metal with properties ideal for spark plug construction. Using this element, DENSO has evolved spark plug design to a new level.

Denso's Iridium power spark plugs help your vehicle achieve unparalleled performance. It alters the belief that a mere spark plug can add power and mileage. This is done by combining an ultra-fine 0.4mm diameter Iridium center electrode with a tapered cut U-groove ground electrode. Iridium conducts electricity better than platinum, however what makes it exceptional is it's also 6x harder and 8x stronger than platinum. Because of this, the center electrode can be machined down to 0.4mm. This ultra-fine iridium center electrode provides superior ignition performance during acceleration and top cruising RPM. The U-groove ground electrode creates a larger, brighter flame kernel. The tip of the ground electrode has been tapered which further improves firing performance by reducing quenching. All of these features combine to give more horsepower to your motor.