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AR-33 appear to be

January 12 2018 at 4:58 PM
FElony  (Login FelonyFord)

Response to Performance cars got 32's and most of the rest got 42's

the closest match to the BF-32, which as mentioned was the stock CJ plug. From what I've read, modern, more efficient ignitions and different pump gas formulations have skewed heat range choices from the original production items, so I would suggest testing different plugs for compatibility with your own setup.

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