[XtremeRevolution]

can you do a write up on a how-to?

There is a write-up for checking and adjusting the spark plug gaps, which is basically the same thing.

To the OP: I believe the spark plugs are simply updated revisions of an older plug. You may find that one or the other may be discontinued or low in stock. I don't think either will cause any issues.

 

[XtremeRevolution]

I'm a little lost, what's the difference between non tuned and stock?

I think he waa referring to the gap that you should expect to measure from the factory. Un-tuned is what we recommend you adjust them to.

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