Where do I buy ngk iridium tip 7 heat spark plugs?

[Tamago]

Originally Posted by yaris-me

My understanding is that only one company makes the iridium plugs, so it doesn't matter which, meaning NGK or Denso, you buy. Go with the best price.

care to back that up with some facts?

[yaris-me]

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.

[Tamago]

Originally Posted by yaris-me

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.

no problem :) thanks for googling it !