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2000 RSTi
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I remember running into this issue with my old ej20k setup (which are essentially the same heads as ej25d).

There was a post on Nasioc showing which p/n fit what heads, and included a page from the FSM with diagrams.

I tried searching for that Nasioc thread but I'm coming up empty.

Essentially the valve covers have different amount of the nubs that I highlighted in your pic. And I was able to get the right gasket for my JDM heads, from a USDM model.

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