Neither did mine. But a drill and tap will fix that in short order. There are plenty of threads on the forum regarding G50 / 930 lubrication and how to set that up. Relatively inexpensive to do and I think if the cooler is located in the right place (mine isn't) then it'll cool well and take care of business. I too run good oil in the box but I don't think it'll survive 13 hour duty without cooling, at least not from the temps we've witnessed. The Porsche racers I've spoken to that race the 930 and G50 boxes indicate that cooling is critical to getting a decent service life from them.
thanks Ron, wasnt aware it was a big issue so off to have a read, this might be another winter mod then!
i tend to do trackdays (10-15mins on track then a break) or the odd sprint (warm car up then 50s sprint track) so altho the oil isnt hot for long i bet its getting a pasting.
cost me about £70 to fill the box!
out of interest, how much oil are people using in their G50s? mine is inverted and i seem to recall i have to run a bit more oil than a std fill.