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 FeedsWeather Can?t Stop Swanfest Money In The Bank At Rockingham Dragway. Here's a recap of who scored wins at this no time party.
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The Midwest Nationals marked an important point in the NHRA Countdown. See who picked up wins in St. Louis this weekend.
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Two days after setting a new stick-shift world record at FL2K, Brett LaSala's "Snot rocket" Mustang lost a tear tire at over 200 mph.
Ron Capps returns to St. Louis chasing a win and points in the Countdown. Maddi Gordon debuts a historic NAPA Auto Parts Top Fuel scheme.
CGM found clutch issues behind its recent Funny Car traction problems. The team heads to St. Louis ready to pick up another win.
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Recent Technical Articles
Zimmerer And Wheeler Score 2026 CHAOS Titles
It was a wild year for the Funny Car and Nitro CHAOS series. Here's a recap of how the title chases played out and who scored the wins.
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