Another spark plug question

Huckster

Huckster

Senior Member
What are the differances if any in the 28,29 3x and the 30/31?also are there more than one kind of 3x repros?
 
While the thread on the 22nd has your answers, I took a photo out of that thread to show the main differences that one would see right away in the thickness of the hex.


The thin hex (middle) is the late plug and the thick (right) is the early.
61668
 
Sorry to be repetitive but i was not sure if that was the only difference or not. were the repro plugs manufactured the same?
 
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