Can I just ask, what the problem with the stock radiator?
Do people have problems with it overheating on the road, or even trackdays?
I've not had a problem with mine at all. The thermostat controls the temp anyway, so the rad isn't going to make anything cooler, the stat will still open and close at the same temp no matter what rad is fitted.
Only benefit I can see for a big rad like that is if your sitting in traffic on a hot summers day.
Someone please explain!