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 FeedsSick Summer took racers to some amazing tracks. Here's a recap of all the drag-and-drive action from Sick Summer 2026.
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Team Bucketlist Mob has been selected for the Horsepower Wars $10K Drag Shootout. Learn more about this unique team right here.
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The IHRA Triple Crown put on an epic show. Here's a recap of who won and could be racing for a million dollars this September at Maple Grove.
This isn't your standard Li?l Red Express. Rick Russell has turned this Dodge truck into an 8-second drag-and-drive monster.
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Small tire racing is always evolving. X255 has been introduced to give racers a lower-cost option to compete at big events.
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Alaska Speed Week Delivers A One-Of-A-Kind Drag-And-Drive Adventure
There are drag-and-drives, then there's Alaska Speed Week. This unique event combines drag racing with some spectacular views.
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