The sports are .08" lower, and stiffer. Install them on a non-sport with OE rear springs/bags/shocks/sways will result in INCREASED understeer.

Rule of thumb, more stiffness across an axle DECREASES grip on that axle.

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'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!