I emailed Bilstein directly and received this response: "The Eibach spring kit that is provided is built proprietary for Bilstein. This spring kit is very similar to the Pro Kit that is sold separately. The B8 can be used with the Eibach Pro Kit and work very well together."So with the B12 kit, has it been confirmed which Eibach springs come with it? Is it the normal Sportline springs?
That's from a North American Technical Sales Rep. Not sure if I buy it though.
Out of curiosity I emailed Koni to see what springs they use in their kit and they confirmed they are just the Eibach Pro Kit, but the part number they gave was 85117.140. That appears to be the 'American' Pro Kit with progressive springs.
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