Where do I buy ngk iridium tip 7 heat spark plugs? - Toyota Yaris Forums

03-02-2009, 12:04 AM

yaris-me

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Drives: 2007, Meteorite, LB

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Quote:

Originally Posted by Tamago

care to back that up with some facts?

I'm wrong. Denso did develope the iridium spark plug and initially manufactured iridium spark plugs for NGK.
http://www.sae.org/technical/papers/1999-01-0796
http://sciencelinks.jp/j-east/articl...99A0985843.php
Since, NGK has gone on to manufacture their own iridium spark plugs. Denso is still the leader in developing the iridium spark plug.
http://www.globaldenso.com/en/produc...df/SAE-M10.pdf

I appologize for the mis-information.

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