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 FeedsJimmy Taylor is our guest on this episode of The Dragzine Podcast. Taylor talks about setting records, his racing history, and future plans.
IHRA owner Darryl Cuttell has broken his silence on the sanctioning body's issues. Alleged non-payment from Elon Musk is covered.
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One of the toughest jobs in drag racing is being a nitro crew chief. Chris Cunningham provides some insight as to what its like.
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The NHRA Mission Foods Drag Racing Series could have multiple broadcast homes in 2027. A new media rights package is coming next year.
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Summit Motorsports Park's Night Under Fire put on one heck of a show. Check out our recap of this epic event and massive photo gallery.
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Drag Illustrated World Series of Pro Mod Heads To Texas Motorplex For 2027
Drag Illustrated's World Series Of Pro Mod is moving again. The event will relocate from Bradenton Motorsports Park to the Texas Motorplex.
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