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Old Jan 6, 2005 | 08:23 PM
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93civicsedan
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Joined: Feb 2004
Posts: 273
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From: NYC
Default spark plug choice

Is it safe to use denso iridium IK20 spark plugs on my engine? its stock except for an aem intake. friend of mine recommended them but according to this site alloemautoparts they are for cold heat range for hi-speeds. whats that mean?
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