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 FeedsIf you like Pro Mod racing you'll want to check out the Doubleheader Smackdown. The MWDRS is bringing the action to Flying H.
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Baileyton Good Time Drag Strip in Alabama is for sale for $1.4 million, offering a turnkey, fully operational 1/8-mile racing facility.
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Maple Grove Raceway announced a temporary closure and pause on racing operations. The track is working on a restructuring plan.
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Jake Marshall is a Pontiac fan so he had to build a GTO. Marshall's 1966 GTO is totally cool take on the iconic muscle car.
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One of the biggest drag-and-drive events in the country is back. Check out what's going on at Sick Michigan Miles.
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Recent Technical Articles
Team Kalitta Takes Tight Championship Battles To NHRA Brainerd Nationals
Team Kalitta wants to lock down egular season titles in Top Fuel and Funny Car at Brainerd . Here's how the team plans to get it done.
NewsSource Yesterday, 11:16 AMMore...