I've seen a couple of Z4s with this style of wheels. Looked pretty good to me:
EDIT: Can't link to a certain vendor. Google "Eurosport 5371". Here's what it looks like:
http://www.advanceperformance.com/ga...el=album&id=97
It's the first 5 pics. Says Miro 942 (now discontinued), but it's the same style of wheels, which is the 335is wheels.
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[Current] Tesla Model 3 Performance
[Retired] Audi R8 V10 6MT, BMW i3 BEV, BMW i3 REx, BMW Z4 sDrive35i DCT, BMW 335i Coupe 6MT