too lazy to read the full article, but it says condenser on the side.
edit: sorry should've read the full sentence. it's a compact radiator (a SUBradiator, apparently), i guess to assist the stock condenser?
first sentence (rough translation) - while there are no problems on the streets, during circuit driving the z34's water temps went high enough to trip a temperature failsafe mechanism.
then more stuff complaining about the stock radiator / condenser, but don't feel like translating anymore