if the rims arent offset it shouldnt hit the fender,
the Bilstein sports have an internal bumpstop, you pitch the stocker. The OLD Bilstein struts were dissasembleable (no clue) but the new ones arent. The Bav auto springs shouldnt sit too low unless you have the V8 and offset rims, if you want about another 1/2 inch of height go with Eibach or H & R springs. The tire height of the 17s should be the same diameter as the 15s so that shouldnt be an issue.
I dont know much about the Sachs kit.
95 E34 530I V2.37
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