Wheels on a boxster, will these fit?

[Graniticus]

Hi guys,

New to porsche and forum, was wondering if I could get some help.

I have a set of 4 lenzo samurai wheels (black five spoke) that I had on an Audi a3. Will these fit on a 03 boxster 2.7?

I fear maybe the rear wheels are wider than the front. Also an tips on why I should or shouldn't put them on is appreciated, I'm expecting they are not suitable and need to sell them and get something else.

Also, just a quicky, how can I tell what head units will work with the Bose system in the same car?

Thanks very much, my word these cars are good fun !

Grant