This is a set of 12 Long Reach Massive Spark plugs made by Unison Autolite. I understand that Unison was bought by Tempest and that they are the same plugs as theREB37E, but I do not know that for fact.
I was told that this set was new on the shelf and was just old stock, so predated branding by Tempest. I replaced them with Fine Wire Tempest only for high altitude operation.
They have never been cleaned or sandblasted, and have been pickled in fresh 100w oil. I have read mixed reviews on these plugs so will only guarantee them not DOA, but they were all working well when I removed them.
As you can see from the pics there is zero wear and just a little marking from the wrench. Otherwise are like new. Used for two flights. Less than 10 hours total time.
Prefer to sell as a lot. May split up if they don\'t move.

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