[Jens Wendorff]

Nothing up to the 993 at least.
There are aftermarket products made of aluminium which should work well on ordinary cars. They are highly recommended by some classic car magazines for old Mercedes, Jags, etc.
They are also available for older 911, and I more than once thought about it.
I just cannot imagine a proper engine/oil cooling on the air cooled flat6 when you virtually keep out the air ventilation in the oil-coooler/oil-line/oil tank locations.

Any opinions?
I can dig out at least one supplier in Europe if anyone is interested.

Jens