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 fans have spoken and we now have four teams for the $10K Drag Shootout. Team Food Stamp Fast has been selected as the final team.
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The NHRA is heading back to its roots for the start of the 2027 season. Here's a look at the first four races of the 2027 NHRA season.
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Learn how pre-assembly underhood heat management prevents volatile E85 vapor lock, brake fluid boiling, and high-voltage arcing.
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The McLeod RST HD Clutch Kit delivers massive holding capacity. This hybrid disc gives drivers street comfort and heavy track grip.
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