It's correct part for JeepM151 A1 A2, M38 and so on. P/N is Autolite 2243. The most you can see is 2245 but this one is 2243. 2243 = Cooler plug. 2243 (cooler) : Better forhigh-performance ,high-compression, orhot-running engines — it resists pre-ignition and detonation.
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