Doesn't anybody know the answer to this one? Somebody has got to know.
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===>  I'm with you Todd, I don't understand.  I thought these nozzle valves
were only on the turbo cars, but sure enough, they're on the NA engines too.
For the FD (3rd gen), they connect to the outlet of the primary turbo, so
you'd think maybe they're using the turbo boost to get an extra surge of oil
in the rotors. I have no idea where they would connect on an NA engine, but
I must say that I'm curious now.

Rusty (radiator mounted)