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 New England Nationals never disappoints. Check out our massive photo gallery that captures the feel of this event.
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Ron Capps is being honored by Bristol Dragway. Capps has been selected a Legends of Thunder Valley honoree for 2026.
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The first team for season four of the $10K Drag Shootout has been selected. The Preston brothers and Team Next will join the show.
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Aaron Stanfield is adding another line to his racing resume. Stanfield will drive the Elite Motorsports Pro Mod for the rest of 2026.
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The owners of Muncie Dragway announced this week that the historic racetrack has officially been put up for sale.
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Recent Technical Articles
Team Z Motorsports Releases Lightweight Door Hinges And Steering Columns For 4th-Gen
Team Z now offers an aftermarket steering column and door hinges for the 4th Gen F-body. Here's a look at these new products.
NewsSource Today, 04:10 AMMore...