944 rear discs - solid or vented?

[Rex Surewood]

Hi.

Quick question.. Are all 944 rears vented?
Reason for asking is, when you (like me for example) use solid discs on the front, it seems a little out of proportion with vented ones in the rear..
I have my hands on a pair of 944 alu rear arms with brakes and everything, and I'd like to know my options before I start fitting them to the car..

Thanks in advance!