QUOTE(samurai20 @ May 29 2014, 02:16 AM)
Hello..
New owner CRZ or i call my car Lizzy...

..just want some info..
I want to change my stock rim to new O.Z. Ultraleggera in Matt black colour , 8j x 17" offset 48. but im worried it will effect FC and handling.. anyone here using same size of rim... can u give me some tip or info before start to order this rim... thks..

Bigger = heavier rims, heavier tires, higher rolling resistance; but bigger contact patch (trade-off higher resistance), less tire wall flex during hard cornering.
In short, yes it will give better handling, but if you are those who are concerned on small FC changes, then stick to ori rims, as that is the best compromise the manufacturer can provide. As to how much the FC will drop, it all depends on your right foot.
I am running on 18" BTW, so 17" FC compromise is pretty small in my opinion. However, my rims are lightweight rims which helps tremendously on FC (among other things).
Cheers!