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Old 07-08-2010, 12:34 AM   #386
Tyler T
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Join Date: Dec 2006
Fan#: 42066
Location: Simi Valley, CA
What I Drive: two '02 SVT's

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the 411 on spark plugs: http://www.motorsport-developments.c...AF272_tech.pdf Iridium is preferable because the thinner center electrode diameter allows for a higher quality spark and because iridium degrades much slower than copper it allows you to run a larger gap (or just replace your coppers constantly). Also the AZFS22C is the proper heat range for a regular Zetec but I don't think it is the proper heat range for a SVT. also helps out a lot for the specs for different plugs and they have some of the best customer support I have ever worked with.
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for quality repairs and modifications in the LA area:
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