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 Hartman family has their eyes on picking up a Factory Stock Showdown win. Here's what the father and son have to say about racing.
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Lance Knigge surfaced a rarely referenced rule Saturday when he potentially won a round but his car flew over the finish line beams.
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Krista Baldwin makes her return to NHRA Top Fuel. Her dragster will have a special Chris ?The Greek? Karamesines theme for the Joliet event.
Summit Motorsports Park hosted the inaugural Turn & Burn drag-and-drive. We've got the event recap that features all the winners.
Bobby Dodrill was unhurt after a violent crash in his four-wheel-drive ?Miss Misery? C10 during Battle For The Thrones at U.S. 60 Dragway.
Recent Technical Articles
Davey Hull Resets X275 Record At Battle For The Thrones
The X275 record has fallen again. Davey Hull laid down a 4.02 and pushed the class record even closer to the three-second zone.
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