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Originally Posted by mlifxs
i called eibach on cybermonday to find out about spring rates. for parts 2085 and 2092 for e90, they told me 148/457 front/rear, both part numbers. To my surprise they quoted the spring rates as linear. So if that matters to you, you might want to verify.
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Really? I've read for years that those Eibach pk springs are progressive rate? Vendors used to pair them with Koni fsd which was probably not such a good idea.
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2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, Koni/M3 susp, Apex Arc 8, Mich PSS