Just for clarafication I have 2011 M sport springs on my car. I swithced to the 2011 M Sport springs when I replaced my stock dampers with Koni Sport dampers. One of the main reasons I went with the 2011 springs is because they were linear rather than the progressive springs that came on my car.
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2009 BMW LeMans Blue 135i/Dinan Stage 2 tune/Alufelgen SF-71s/M3 suspension components/Koni Sport adjustable dampers/ETS FMIC/M3 paddle shifters/Alpina B3 TCU flash/VRSF charge pipe
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