Originally posted by Stazi:
NGK make Iridium plugs to if you MUST have them
NGK and others who clame iridum plugs are crap. NGK has approx 20% irdium content compared to denso's.
Give me 12 hrs so i can go into work and get all the data, but I just did a 400 hr long durability test on the 3 types of iridum plugs and denso ow3z.
-Tim 
Tim
Ex - ContourPower
2001 Saab 9-3 Viggen
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