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      09-15-2011, 07:29 AM   #1
Stuart@BMRAutowerkes
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Drives: a black car
Join Date: Sep 2010
Location: Sydney

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E90 Lowering Springs (Eibach/HR) + Pics

Lowering springs seems to be a common mod and a big area of discussion amongst the E9X owners so just to help people out and summarise:

Eibach Springs (prokit) - progressive spring rate. Generally accepted to be slightly more comfortable than HR. People usually experience a drop of ~30mm.
Eibach prokit have a spring rate front/rear of 148 lb/in and 456 lb/in respectively.
Compared to stock E90 Sports rates front/rear of 145 lb/in and 460 lb/in.
So they are very similarly weighted however offer a drop of 10-15mm more than the Msport height.

HR Springs - linear spring rate. Generally accepted to handle slightly better than Eibach. People usually experience a drop of ~30-35mm.

I installed a set of Eibach springs on playwithonehand's car... the below pics show Eibach VS standard non Msport.

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