As far as I know there is no height difference between the regular and sport springs. I questioned my sales rep on that before I bought and he said no.

Here's a shot of an '04 with the H&R springs. Looks good to me.

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'05 X3 3.0i Alpine White/Gray Leather/Alum. Trim
Sport/Steptronic/Servotronic/Panoramic
Prem. Sound/Staggered 18" Style 114 Y-Spokes