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Old 10-26-2020, 10:52 AM
Michael C Henry Michael C Henry is offline
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Join Date: Mar 1999
Location: TACOMA, WA
Cobra Make, Engine: Everett Morrision FE 427 so 2-4s
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I went to GTSparkplugs website and their guide said that MOMO, SPSRCO, ISOTTA, and NRG have 6 bolt 70mm PCD. " PCD" kept coming up I still do not know what that means.
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