thats the pcv valve, pretty common to break on the vr6. Quite expensive to replace as you cant just get that piece but have to get the entire plastic intake thing.
A cheap fix would be to put a breather on the crankcase like I did (ill find a pic in a sec) and block the whole in the intake. Or you could just replace the whole thing with a bit of hose, which is probably more legal (have a feeling the other way isnt) but you may have to clean out the throttle body every now and then.
Theres also a "PCV fix" and other things like that availiable from 42DD
said pics:
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