Not 100% sure but I think only one on a V6.
'Ah well, I suppose it had to come to this.'
I have a VY II SS and I have 2 cats.
Extractors, 100cpi ballistic cats, Sureflo 3.5" medium exhaust, DUS OTR, Oztrack Tune, Phreddy dash, stereo, black windows, Lovell springs, and a good alarm
They have x2, Straight of the Exhaust manifold Primaries.
They don't have them on the Y piece like previous models.
Cheers,
Super6
Yeah pritty sure they have 2
series one has one, series two has two (on the V6)
some of the V6 series 2's have 2 cats, whilst the others have 1