Tremont55
06-13-2012, 04:03 PM
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Tremont55 newbee - LS6 what is the best or really good spark plug tha could be used and what should be the gap. I have read the AcDelco P/N 41-985 comes factory gaped at .040 or .060 ?? and should not be changed. Also been told the NKG 55's gaped between .050 and .060 are also good? Help
