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DENSO Iridium Power Spark Plug [IUF14-UB] 5389

DENSO Iridium Power Spark Plug [IUF14-UB] 5389


DENSO Iridium Power Spark Plug - Single Plug

Single Plug


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DENSO Iridium Power Spark Plug [IUF14-UB] 5389

General Details:

Diameter [mm]10
Spanner Size16
Tightening Torque [Nm]12
Weight [g]30
Country-spec. modelJapan
Spark Plug1 - Earthed Electrode
Thread Length [mm]12,7

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DENSO has been setting the standard for spark plug technology since 1959. They develop all of their ranges in-house, and manufacture them in their own ISO9000 certified factories worldwide - with 'zero defects' as standard. They also provide this outstanding OE quality to the aftermarket. Including Standard, Platinum and Iridium, DENSO Spark Plugs cover a complete range of continually updated references. Guaranteeing optimum engine performance, choose DENSO Spark Plugs for every automotive, motorcycle, marine and small engine application.

DENSO's Iridium Power Spark Plugs bring all the benefits of iridium technology to the mainstream motorist. Whatever type of car you drive - DENSO's Iridium Power Plugs are extremely tough and wear-resistant, with superb ignitability. Responding to increasingly strict European emissions legislation and the rising cost of petrol, another important benefit for motorists is that Iridium Power Plugs can improve fuel economy by up to 5% compared to standard plugs.

Spark Plug Health Check

Use Spark Plugs To Check Your Engine Health
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Heat Ranges Explained

Learn what a spark plugs heat range means, and how it can effect your engine
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Heat Cross Reference

Use our spark plug heat range cross reference table
Cross Reference Heat Range


  • Improved cold-starting
  • More efficient fuel consumption
  • Better engine performance and acceleration
  • Smoother idling performance and throttle response
  • Original equipment quality now available to the aftermarket
  • Plugs available for all applications
  • Lower required voltage and high ignitability
  • Suitable for high response driving

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