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Spark Plug designation #3212262 02/09/24 06:06 PM 02/09/24 06:06 PM
Joined: Jan 2003 Posts: 296 Michigan P Ply36 OP enthusiast
Ply36 OP enthusiast P Joined: Jan 2003 Posts: 296 Michigan	I'm trying to replace the spark plugs in my 1952 Desoto (with the flathead six). The manual calls for an AR8, which i believe is an Autolite brand. Anyway, I can't find that particular series at any of the normal national chain auto parts stores. Does anyone have a source that has this specific plug or at least a reliable cross-reference to a series currently available? Thanks for any assistance.

Re: Spark Plug designation [Re: Ply36] #3212272 02/09/24 07:00 PM 02/09/24 07:00 PM
Joined: May 2019 Posts: 6,261 nowhere S Sniper master
Sniper master S Joined: May 2019 Posts: 6,261 nowhere	Look it up by application, RockAuto lists many options. The AR8 is an old designation. The modern number is 306 for resistor, 295 for non-resistor if you are looking for Autolites. I run the 306 in my 51 Plymouth.

Re: Spark Plug designation [Re: Sniper] #3212281 02/09/24 07:34 PM 02/09/24 07:34 PM
Joined: Jan 2003 Posts: 296 Michigan P Ply36 OP enthusiast
Ply36 OP enthusiast P Joined: Jan 2003 Posts: 296 Michigan	Thanks, Sniper! That's what I was looking for

Re: Spark Plug designation [Re: Ply36] #3212300 02/09/24 08:20 PM 02/09/24 08:20 PM
Joined: Jan 2003 Posts: 1,893 Harriman NY 7 71GTX471 top fuel
71GTX471 top fuel 7 Joined: Jan 2003 Posts: 1,893 Harriman NY	NOS AR-8 on ebag $5.35 ea.

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