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      11-08-2011, 09:52 PM   #29
luckyu
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Drives: 2007 328i, 1998 328i
Join Date: Jan 2007
Location: San Francisco Bay Area, California

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Roll bar springrate. Assuming same dimensions.

13 mm ... 24 lb/in
14 mm ... 32 lb/in
15 mm ... 42 lb/in
M3 ....... 109 lb/in
20 mm .. 133 lb/in
__________________
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.