Quote:
Originally Posted by Twixboy
Just curious, how does the Z4 M suspension compare to the 2004 3.0i M sport suspension? I'm assuming its a direct swap, but would it be an upgrade?
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The front suspension on the Z4M is from the E36 M3. The rear suspension is from the E46 and the trailing arms, control arms, sub frame mounts are the same across the Z4 models. The rear shocks, springs, and sway bar are different.
The M Sport suspension falls between the standard suspension and the M suspension.
OP, I'd recommend the Koni Sport struts and shocks with your stock springs so long as they don't have any signs of corrosion. The Koni's are adjustable so you can set the firmness to your liking and Koni's have a lifetime guarantee.