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Discussion Starter #1
I'd like to know what everyone here thinks about the Iridium plugs. I've heard some say that they're the greatest plugs out there, and some say that they'll cause major engine damage.

In my particular case they'll be used on a supercharged '99 GT. Please post all of your thoughts/theories/facts/etc.

Thank you...I don't wanna blow my motor just yet...
 

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Use copper plugs and replace them every 10k miles. They cost less than $2 a piece. Platinum plugs last longer if you don't like to change them that often but copper is a better conductor.
 
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