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Originally Posted by Twix
KW makes coilovers. AC Schnitzer makes springs for the X1, not sure how much lower they would be over stock m sport. If E90 springs work, There's almost endless options. I plan on buying the ACS springs for my sportline 28i, but the KWs are a killer way to go
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Trying to get more info on acs springs, lowering ratio etc but there is not much info out there