Searched and didn't see anything about these. Wonder if anyone has ever ran the AR3923 plug. They are almost identical to the regular 3923, just in a race application.

3923:
http://www.power-21.com/AutolitePowe...px?b=A&pn=3923

AR3923:
http://www.power-21.com/AutolitePowe...?b=A&pn=AR3923

My local Advance carries them...just curious.

 

Interesting. I didn't even know it existed.

 

According to the chart, they are in the same heat range, so I guess the platinum tip and the nickel plating are the only differences in the two. All other info appears to match up... I will probably be buying new plugs in about 3K miles, so I may give these a try.

 

Ya, I might try them next time just to see. I doubt you will notice any difference. Probably won't last as long either.