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 FeedsJeff Rudolf experienced a horrific crash at the end of the 2025 season at Bradenton. Rudolf has rebuilt his Pro Mod and is back racing.
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The 2026 PDRA season reached its halfway point at MDIR. Here's a recap of all the action from the PDRA North vs South Shootout.
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The NHRA Pro Mod Playoffs opened at the Summit Racing Equipment NHRA Nationals. Kevin Rivenbark picked up the win and points lead.
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Taylor Dietsch swung the big bat at Norwalk. Dietsch picked up his first Factory Stock Showdown win of 2026 and took down the points leader.
The Summit Racing Equipment NHRA Nationals was epic. Here's a recap of all the action from on of the best NHRA events of the year so far.
Recent Technical Articles
IHRA Announces Major 2026 Schedule Changes, Cuts Multiple National Events
The IHRA announced major changes to its Outlaw Nitro Series schedule. Several races have been removed the schedule due to facility issues.
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