What bolts were you going to use? Not so easy to find M10x70 mm 10.9 partially threaded thick zinc coated ones. 8.8 spec similar bolts I could find on BMW parts but especially when they are longer than original I wouldn't take the lower strength ones.

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E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
E70 X5 40d -12 M-Sport Space grey