If spacers help the situation, which I don't see them doing, please factor that in.

Or is this a specific wheel size for WB porsche (turbo gt3rs)

reason for asking is I have to have a set of LM-Rs and trying to figure out on which Porsche they will fit on, if not both

 

you would need some serious spacers - I have 19x11's on my Cayman but have +38 offset and this just makes it.

 

needs a 25mm spacer eddie...that offset sounds like it is from a 996 narrowbody

 

Very aggressive fit however. The edge of the wheel will be slightly outside the body.