stream music using arduino bluetooth

I would like to connect my iPhone to my car radio and stream music to the radio. The radio has a audio connector but no Bluetooth. Is this possible?

Yes.
http://www.parts-express.com/bluetooth-receiver-with-fm-transmitter-and-usb-charger--320-357
http://www.parts-express.com/battery-powered-bluetooth-wireless-audio-receiver-with-power-supply-black--320-355
Other options exist also.

Many thanks - just what I was looking for.