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      10-01-2019, 02:11 PM   #9
KRS_SN
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Drives: F15,F30, F34, E91.
Join Date: Oct 2018
Location: Glasgow

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[QUOTE=liveevil;25302116]
Quote:
Originally Posted by KRS_SN View Post
if yours is xdrive your springs are base and not msport.
I have acs springs on mine. My dampers also are due a refresh and im facing the same question.
go b8
go b6
or go with oem but b4
i don't think anyone has the answers and we have to find out ourselves.
Im too squeamish about b8 as acs springs only lower by 25mm and b8 are for cars lowered by <40mm AFAIK so b6 or b4 is my plan.
Or go with ACS dampers but at 1300 a set its a big outlay.
I have the m sport springs because it is non x drive. Question is whether b6 or b8

Hi
I spoke to bilstein today
They were quite clear in their advice

if you are msport and have oem springs you should ask for a b4 sports damper if youv wish a ride as close to oem as possible.

if you want a firmer (25%) sportier ride or if you have lowering springs b8 is for you

msport springs lower the car minimally (?10mm) so technically it is b8 for you but probably b6 should be equally fine.