Thread: 87 300E spark plugs-H9DC or H9DCO?
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Old 04-04-2002, 11:04 AM
lizem100 lizem100 is offline
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Join Date: Apr 2001
Location: fort worth
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87 300E spark plugs-H9DC or H9DCO?
I read a while back that H9DCOs may be better than H9DCs? Any truth? Do they cost more?
Thanks.
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