I too have the Eibach Pro Kit and yes, according to Eibach it lowers the X5 1" to 1.25"...I never heard of sportline though. It would be interesting to see.

Let me know how it goes Bimmer King if you decide to go that route. I'd definitely like to see the results.

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'04 BMW X5 3.0i TitanSilber Metallic
'03 Lexus GX470 Black Onyx
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'03 BMW X5 3.0i Black Sapphire SOLD