Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

Bilstein B4 or B6 all round - prices

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
ajguk
Member
Member
Posts: 91
Joined: Sat May 25, 2019 9:57 am

Bilstein B4 or B6 all round - prices

Post by ajguk » Mon Jun 14, 2021 2:40 pm

Hi

I've been considering upgrading my suspension for a while now and have been looking at the B4s - more or less OEM ride I assume vs the B6 which will be stiffer. Any ideas on what a garage would quote me for the 4 struts plus fitting? And should I get top mounts and bushes done at the same time?

If it was just the rears I'd do it myself but I don't fancy playing with spring compressors.

Thanks
2009 sDrive30i, deep sea blue, ivory

Phippy
Member
Member
Posts: 232
Joined: Sat Jan 30, 2021 2:12 pm

Bilstein B4 or B6 all round - prices

Post by Phippy » Mon Jun 14, 2021 4:09 pm

I bought this set today, company emailed to get VIN number and axle weights and posted it this afternoon.

https://www.ebay.co.uk/itm/131853384648

Went B4 as consensus was for better ride quality and also no need to tell insurance (although lower springs may still require a call) can prob just get the shocks though
2008 BMW Z4 3.0SI Sport Coupe
2013 VW T5.1 Camper - Built not bought

User avatar
sw4nny
Senior Member
Senior Member
Posts: 1713
Joined: Mon Sep 16, 2013 12:14 pm
Location: Barnsley

Bilstein B4 or B6 all round - prices

Post by sw4nny » Mon Jun 14, 2021 6:34 pm

Fronts
Bilstein b4x2 £121
Suplex sport springsx2£146
Top mounts£20x2
Supplied by me
£200 to fit plus they fitted 2 outer track tie rods
Rear
Bilstein b4x2 £200
Suplex springsx2 £100
Spring cap£20x2
Getting fitted tomorrow so should be around same price possibly cheaper to fit.
I may have got prices for front and rear wrong way round.but it was defo £200 to fit fronts.
E85 3.oi titan silver,Maldives blue E85 3.0i gone but not forgotten

Pbondar

Bilstein B4 or B6 all round - prices

Post by Pbondar » Mon Jun 14, 2021 7:39 pm

I run B8 on MSport springs..on 17” or 18” rims..ride is great with modest ‘stippling’ over 30mph road ripples but much much better control on bends and high speed bumps..

Rides much better than any E85 according to my E85 pals.. :driving:

FWIW :thumbsup:
Last edited by Pbondar on Mon Jun 14, 2021 10:47 pm, edited 1 time in total.

flybobbie
Lifer
Lifer
Posts: 4016
Joined: Sat May 25, 2013 8:27 pm
Location: Stourbridge

Bilstein B4 or B6 all round - prices

Post by flybobbie » Mon Jun 14, 2021 8:02 pm

I fitted B6 to replace standard, feel about the same, not harsh at all. Rides a lot better.
Been on about 6 years now.

mcbutler
Senior Member
Senior Member
Posts: 2551
Joined: Fri May 26, 2017 3:40 pm
Location: Plymouth

Bilstein B4 or B6 all round - prices

Post by mcbutler » Mon Jun 14, 2021 9:15 pm

Go to the eibach website they do balanced kits for the car.
I bought their upgraded-lowered springs and the difference was amazing.
I always upgrade suspension one piece at a time till its right, no point shelling out a fortune and finding out you have a car that handles bends but is bloody awful at everything else.
https://www.eibachshop.co.uk/eibach-b12 ... 224678.htm
The dampers are bilstein
Mark
Plymouth
E89
35i
Carmine Red
Black leather

Silverstar
Senior Member
Senior Member
Posts: 2716
Joined: Fri Jun 21, 2019 10:06 am
Location: Costa Del Sol

Bilstein B4 or B6 all round - prices

Post by Silverstar » Mon Jun 14, 2021 10:36 pm

flybobbie wrote: Mon Jun 14, 2021 8:02 pm I fitted B6 to replace standard, feel about the same, not harsh at all. Rides a lot better.
Been on about 6 years now.
Did you get the lowering springs to go with the B6 or did you stock springs?
2009 sdrive30i auto Sapphire Black / Coral Red

Pbondar

Bilstein B4 or B6 all round - prices

Post by Pbondar » Mon Jun 14, 2021 10:49 pm

Silverstar wrote: Mon Jun 14, 2021 10:36 pm
flybobbie wrote: Mon Jun 14, 2021 8:02 pm I fitted B6 to replace standard, feel about the same, not harsh at all. Rides a lot better.
Been on about 6 years now.

Did you get the lowering springs to go with the B6 or did you stock springs?
B6 is for stock springs

B8 is for MSport or Eibach shorter springs..

ajguk
Member
Member
Posts: 91
Joined: Sat May 25, 2019 9:57 am

Bilstein B4 or B6 all round - prices

Post by ajguk » Tue Jun 15, 2021 9:31 am

Thanks all. I think I'll stick to B4 or B6 as I have a couple of new springs on there already from last year and I'd like to keep stock height. Worth phoning my local indy to see if they'll fit customer supplied parts?
2009 sDrive30i, deep sea blue, ivory

Pbondar

Bilstein B4 or B6 all round - prices

Post by Pbondar » Tue Jun 15, 2021 10:47 am

ajguk wrote: Tue Jun 15, 2021 9:31 am Thanks all. I think I'll stick to B4 or B6 as I have a couple of new springs on there already from last year and I'd like to keep stock height. Worth phoning my local indy to see if they'll fit customer supplied parts?
B6 does offer a worthwile increase in damping over the B4s :thumbsup:

User avatar
dhobbs
Senior Member
Senior Member
Posts: 1621
Joined: Mon Jul 16, 2012 5:33 pm

Bilstein B4 or B6 all round - prices

Post by dhobbs » Tue Jun 15, 2021 12:04 pm

From what I can gather from the bilstein site (not very clear tbh) but b4 are replacement for se shocks, b6 and b8 are for the m-sport shocks (b8 allowing for a further lowering with eibach springs).

B6 will be good if you keep the same springs and don't lower it.
3.0si roadster. Requisite stubby. Sound gen mod. LED numberplate lights. LED boot strip. Interior lights LED too. ZHP gearknob. Daily drive :driving:
Motor in boot. Bilstein B8 dampers. New radio, much better sounds :thumbsup:

Pbondar

Bilstein B4 or B6 all round - prices

Post by Pbondar » Tue Jun 15, 2021 12:30 pm

dhobbs wrote: Tue Jun 15, 2021 12:04 pm From what I can gather from the bilstein site (not very clear tbh) but b4 are replacement for se shocks, b6 and b8 are for the m-sport shocks (b8 allowing for a further lowering with eibach springs).

B6 will be good if you keep the same springs and don't lower it.
On the E89 my reading (which may be incorrect) is..

B4 for standard sprung E89s (ie non MSport)
B6 for standard sprung E89s but better damping
B8 is for Msport or other lowered springs with same damping rates as B6

User avatar
Rockhopper
Senior Member
Senior Member
Posts: 1099
Joined: Fri Mar 06, 2020 7:05 pm
Location: Mansfield

Bilstein B4 or B6 all round - prices

Post by Rockhopper » Tue Jun 15, 2021 12:46 pm

This is all very confusing as the reg number checkers on Bilsteins own site plus others say that the B4 is the right one for my car with MSport suspension.

Pbondar

Bilstein B4 or B6 all round - prices

Post by Pbondar » Tue Jun 15, 2021 12:53 pm

Rockhopper wrote: Tue Jun 15, 2021 12:46 pm This is all very confusing as the reg number checkers on Bilsteins own site plus others say that the B4 is the right one for my car with MSport suspension.
You are correct..however BMW does list different shocks for MSport vs non MSport..

That's not necessarily unusual with after market parts.

The flip argument is that the B8 is custom tweaked only for MSport /lowered E89s as they want the damper to work optimally over a shorter travel..

Interesting a a by the way is that BMW uses the same damper on all versions from 18i through 35i ..no wonder it bounces around on the heavier cars..

User avatar
Rockhopper
Senior Member
Senior Member
Posts: 1099
Joined: Fri Mar 06, 2020 7:05 pm
Location: Mansfield

Bilstein B4 or B6 all round - prices

Post by Rockhopper » Tue Jun 15, 2021 12:56 pm

Ah right, sounds okay then as I've just ordered a pair with the right lower suplex springs for my car. I'm not after cutting edge handling, comfort is my priority now :-)

Post Reply