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Old 02-13-2013, 02:09 PM   #1
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Spark plug thread count?

Does anyone know the thread count for a stock AC Delco spark plug for a LS3? We are trying to narrow done some possible causes. Thank you

2006 Pontiac GTO M6 1 of 475
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Old 02-13-2013, 02:32 PM   #2
Iam Broke
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You mean diameter & pitch or total number of ridges?

It's a 14mm thread but I couldn't find the pitch.
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