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 FeedsThe month of May was good to ProCharger racers. Here's a breakdown of the racers who scored wins with ProCharger power.
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Jonathan Allegrucci continues to dominate in Factory Stock Showdown. Allegrucci picked up his third straight victory at Thunder Valley.
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Jason Collins continues to be the hottest driver in NHRA Pro Mod. Collins survived a wild week at Bristol and brought home the win.
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The NHRA Thunder Valley Nationals was an action packed affair. We've got a full recap of all the race day highlights right here.
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Friday was full of big moments at Bristol. Leah Pruett and Jack Beckman scored wins from the rain-delayed New England Nationals.
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Recent Technical Articles
Luke Furr Walks Away After Wild Airborne Funny Car Chaos Crash At Great Lakes Dragawa
The last thing a driver wants to do is become a passenger on a run. Check out this wild ride Luke Furr went for at Funny Car Chaos.
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