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A wizard is never late...
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793 Posts
personally i would go ngk iridium as i know they are a commonly used plug in the k20.
 

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Discussion Starter #3
True, I understand that Honda has gone through countless years of development and all sorts. When they recommend a product, you are 100% sure that it is going to work perfectly for the car.

However, would using the platinum plugs cause any kind of adverse effects?
 
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