Am I right that for the 4.6is I need an 18X8 rim with 5x120 lugs? There are a lot of things out there. Am I best off getting Rims from another X5, or will any rim with those specs work?

I was looking at tire rack for ideas, but of course without calling them, their wheel calculator wants to sell me nothing smaller than 20" when I put in 4.6is. If I say that I have a 4.4i, it brings up 18's and 19's. would those be the same?

Sorry, pretty ignorant about rims.

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2002 e53 X5 4.6is Estroil blue/ Black interior (Build Date 04/02)