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 FeedsDylan Winefsky is working towards picking up his first Funny Car round win. Winefsky is ready to lay down some big passes at Sonoma.
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Building AN hoses can be a challenge when you're putting a project car together. Check out these tips on how to make the process easier.
Nostalgia racing is back at Byron Dragway with Meltdown 10. This event features nothing but the best nostalgia racer has to offer.
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The PDRA has added Mark Beatty to its leadership team. Beatty is ready to help the PDRA grow even more in 2027 and beyond.
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Jake Klein and his father built an impressive truck. The "Nasty Graham" is packing plenty of boosted Gen III HEMI horsepower.
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Recent Technical Articles
Elite Motorsports Looks To Extend Sonoma Pro Stock Dominance At NHRA Sonoma Nationals
Elite Motorsports wants to keep its Sonoma win streak rolling. Aaron and Greg Stanfield are ready to make the Pro Stock final a family deal.
NewsSource Today, 12:10 PM