Ford Mustang Forum - View Single Post - Spark plugs whats best
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post #9 of (permalink) Old 03-09-2016
SHELBY GT 350 Member
2oo5GT's Avatar
Joined: Nov 2007
Location: Valdosta
Posts: 5,089
+1. That's the old two piece design that snapped. For my 05 expedition, I changed the stockers at 100k. Drove fine before and felt no difference after. And talk about sweating as I was changing them out but none broke.
But stick to oem and stock gap. Unless you go With a power adder.
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