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

Mustang FeedsTeam Big 3 Racing is ready to take on the $10K Drag Shootout. This team has no problem dealing with tight timelines and budgets.
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The Kalitta Motorsports drivers are pushing hard for more magic at Sonoma. Each team is preparing for the Countdown that's coming up soon.
The John Force Racing drivers are ready to kick off the Western Swing. Here's how the teams are preparing for Sonoma Raceway.
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The NHRA Western Swing kicks off at the Sonoma Nationals. Leah Pruett and Matt Hagan want to start it off strong this weekend.
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Chad and Hunter Green are looking to land in the final round at Sonoma. The father/son duo have found more performance after testing.
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Here's your chance to own a great grassroots drag strip. Middle Georgia Sports Park is for sale and can be yours for three million dollars.
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