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Denso Iridium Spark Plugs (Gen 1)
Denso Iridium Spark Plugs (Gen 1)
Denso Iridium spark plugs will improve all aspects of performance from acceleration and throttle response to idle stability and mileage. This is thanks to the world's smallest 0.4mm iridium centre electrode.

The tip of the spark plug is made of iridium as this is one of the strongest and has one of the highest melting points. This enables Denso to make a finer, thinner tip which gives the spark plug a concentrated spark and therefore making it more efficient and less likely to miss fire (See the picture above for how small the tip is!). In other words, the slimmer the electrode, the more concentrated the potential, and the stronger the electric field becomes, reducing jump spark voltage. This results in constant combustion in all areas of driving, and improved starting and acceleration.

The ground electrode has a tapered cut. The streamlined taper makes the air-fuel mixture flow more smoothly, guaranteeing steadier ignition. A U-shaped groove (Can be seen in the above picture) has been set into the inside of the ground electrode also. This creates the space volume necessary for formation of the spark nucleus.

Available in various heat ranges, if you would like a higher heat rating or your car is more powerful than standard or you feel your driving style is more demanding than normal please call us for details and we will be able to choose a heat range with you. Alternatively if you know which plug you are after you can select it yourself by the IK number.

Price is for a set of 4.


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Price: 57.00

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3 Product Reviews - Average rating 5 / 5 (Show All)

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Sparkling Performance!

Frootbat - 04th September 2013

Installed these along with the MSD coil pack and magnecor leads. The enight is smoother, quieter and it seems a little more responsive too. Well worth the money.

happy with these

A Hughes - 08th October 2009

Good Plugs. I bought them with Magnecor Spark Leads and found that not only does the car run a lot smoother but I am getting the best MPG i have ever had!

amazing little plugs

T16MSY - 27th May 2009

i decided when i gave my cooper s a full service and engine flush just after it was purchased that i would for a start use a better spark plug set then just replacing the originals.

I went for the denso iridiums and although it had a clean out engine w...

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