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We all know here that the front SZ discs (284x24mm), when available, were a direct replacement for the standard GTV6 ones (269x22mm). I've also read that the front calipers were the same 2 piston Brembos as in the GTV6, so:

Can anyone confirm that the masses/spindles were different? I bet that this is the point as the calipers should be bolted about 8mm away, but I've checked the ePer and both the calipers and spindles show a different reference.

Thanks!

I think I read somewhere that indeed the SZ/RZ spindles were different than GTV6/ 75 ones. I seem to recall they where dropped spindles so I guess a caliper mounting point difference could be possible too.