Well I came up with the The number of turns head thread Test.
Basically there is a seat in the head for the wider portion of the plugs just above the threads to stop on. This seat, notch, ledge, whatever... read more

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Shawn Langdon and Doug Kalitta are smashing the Top Fuel class this season. Here's a look at just how dominant they've been in 2026.
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Eric Trigalet escaped injury after a fiery, high-speed crash in his turbocharged 1969 Camaro at War In The Woods XIV.
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