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      11-26-2011, 09:49 PM   #20
luckyu's Avatar

Drives: 2007 328i, 1998 328i
Join Date: Jan 2007
Location: San Francisco Bay Area, California

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Originally Posted by cpt97m3 View Post
I would do the M3 subframe bushings first.
Why? It's hundreds cheaper to do the rear arm first and see if it solves the issue. If you do the subframe bushings you have to decide whether to do the m3 rear bar at the same time, and that's a big change to how the suspension works.

I would say to focus on specific problems you're having, and do the cheapest stuff first that addresses those problems. Tension struts (in front) and toe arms (in rear) are good candidates for directional stability and mechanical grip.

That said, it may well turn out that subframe bushings are necessary to get the result you want. It's not known, since no one's tried just installing the toe arm, without having done the subframe bushings beforehand.
2007 328i ZSP. M3 suspension: custom valved Bilstein shocks, Hyperco race springs, M3 lower control arms front and rear, M3 sway bars, and M3 subframe bushings. E46 front guide supports. Euro tail lights.