^ note that the fenders won't actually rub with the wheel on the X5 because of the extra height... the pdf may be a bit misleading when it comes to that. I'd recommend either 10-15mm fronts and 15-25mm rears. Depends how bold you want to be.

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'08 X5 3.0si - Alpine White / Saddle Brown interior
Specs: Sport Pkg, Premium Pkg, Tech Pkg, Comfort Access, Aero Kit, Style 433 staggered 20s on Conti DWS
Mods: Carbon 35 tint, LED angel eyes, GP Thunder 7500k fogs, H&R 20mm/25mm spacers, clear reflectors, gunsmoke-tinted taillights
Coded: Digital speedo, windows/sunroof/tailgate close via keyfob

X5 pics at Flickr