Thread: spark plugs ??
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Old 05-24-2012, 05:33 PM
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Ditto the 2 previous posts....stick with the OE copper plugs every 30K. For some oddball reason the 4.7 isn't as happy running anything else. On the plus side, they're a heckuva lot cheaper than the gimmicky high dollar platinum plugs out there! Good luck!
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