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No, I didn't run dyno. Power gain you can see in the video above, also low and mid range improved a bit. Much nicer to drive it daily :)

No.

Hi everyone, This prelude, with swaped h23 head in first post, is mine :) The swap is pretty much straight forward, no machine modifications required. There is one oil passage on the head which must be sealed, if you have h23 head side by side with f20 headgasket you will see it very easily...