yea i agree with that, but usually the external grooves radiate outwards rather than inwards when the cars moving forwards, so any gasses or dust trapped within the grooves are flung out into the wheel rather than in towards the hub, suggesting that these discs look unusual.
Another point to note, is that vented discs 'draw' air from the centre behind the bell and expell air from the outter edge again, hence why when you see race cars with brake cooling ducts the ducting goes to the centre of the disc on the back face so it's drawn out through the void between sides of the disc.
So i guess the simple question is, do the vanes inside your discs go in the same dirrection as the grooves on the outside?
If the internal vanes are in the same direction as the external grooves, then they're on backwards, if the internal vanes are in the opposite direction, then they're unusual, but correct.
I'm more than happy to be corrected, but I made this exact same mistake a while back and was corrected, so i did a bit of research into it at the time.
no big deal, but you might want to change them before they bed in too much more
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