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      07-31-2008, 09:58 AM   #18
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Drives: Z4 M Coupe
Join Date: Nov 2007
Location: Seattle, WA

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I had no idea that the Z4MC/R had progressive springs from the factory. Anyone have specifics on the rates etc.?

Dammmitt, I agree with you that the Z4M is close to perfectly setup by the factory even for moderate track use.

However, once you start pushing the car there are some characteristics that can be improved on- from my perspective these would be a little less roll on tight/high speed corners and the fact that track undulations esp mid-corner do upset the suspension somewhat.

IMHO, the above might be solved with a good set of shocks and lightweight wheels and tires- I was thinking Koni FSDs. But since Koni does not make a set for our cars, we have to choose from the choices out there.
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