Please follow the link below...
http://www.ngksparkplugs.com/techinfo/spark_plugs/techtips.asp?nav=31000&country=US
http://www.sparkplugs.co.uk/pages/pricing/applications/ngk_apps.htm
Spark plugs FAQ
Spark Plug Analysis
Spark Plugs
http://www.sparkplugs.com/sparkplug411.asp?kw=Iridium&mfid=0
http://performanceunlimited.com/documents/plugsidegapping.html
Hope this helps
!!!
http://www.ngksparkplugs.com/techinfo/spark_plugs/techtips.asp?nav=31000&country=US
http://www.sparkplugs.co.uk/pages/pricing/applications/ngk_apps.htm
Spark plugs FAQ
Spark Plug Analysis
Spark Plugs
http://www.sparkplugs.com/sparkplug411.asp?kw=Iridium&mfid=0
http://performanceunlimited.com/documents/plugsidegapping.html
Hope this helps

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