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Old 05-31-2001, 10:51 AM
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yal yal is offline
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Join Date: Oct 1999
Location: New York, Long Island
Posts: 2,705
Sorry Thom you're right the h8dco plug is hotter. Bosch use to go the other way with heat range and their numbers.
http://www.vintagesaab.com/sonett/ss/Spark%20Plugs/sparkplug.htm
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