Cant see any need to do that myself, i know of loads of YB engines that get trashed around race tracks, non of them have such oil lines
It is a WRC mod to get more oil into the top end OR to divert the oil flow upto the top end.
As Graham said, not needed with most applications
Does the head have some sort of oil supply problem in the first place ?
What is the gallery they are feeding ? cam bearings or something ?
9.85 @ 145mph 202mph standing mile
https://www.youtube.com/watch?v=Ss_c7fML3rw
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