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Autolite spark plug question.

Posted By slumlord444 Last Month
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slumlord444
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Autolite 3924 versus AR3924 which are supposed to be racing plugs? I'm running Mummert heads and a fairly radical Isky cam. The AR's were actualy a little cheaper than the regular 3924's,
KULTULZ
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Autolite Racing Spark Plugs AR3924.

Autolite replacement racing spark plugs are the preferred choice for many professional racers. They contain an Yttrium-enhanced alloy, which enables up to 8 percent reduction in side wire temperatures for improved durability and less preignition. Autolite racing spark plugs are available in colder heat ranges...


- SUMMIT

The 3924 is a STD Copper Core Spark Plug - No resistance or suppression.



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