Thread: NGK Spark Plugs
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Old 09-22-2008, 05:57 PM
Chevy454 Chevy454 is offline
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Default Re: NGK Spark Plugs
The 5/8" hex won't matter...in fact, it makes them easier to get a socket on...seems I had 'em listed as 13/16" hex, instead of the correct 5/8", but I fixed it: click

The hotter plug may indeed be better...
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