B8 shock rear

Tornado1M · 07-16-2026, 08:19 AM

Is this only for lowered cars?

Designed to enhance your car’s lowered suspension, Bilstein’s monotube gas pressure technology delivers a sporty ride with remarkable comfort. This class shock is considered by us at FCP as performance upgrade to any shock and is ideal for vehicles with a lowered stance.

mkeiser · 07-16-2026, 01:33 PM

yeah b8 should be paired with lowering springs. i can't remember if b8 can pair with m sport springs...

Tornado1M · 07-16-2026, 02:12 PM

Quote:

Originally Posted by mkeiser

yeah b8 should be paired with lowering springs. i can't remember if b8 can pair with m sport springs...

Ok, is the B6 just as firm?

mkeiser · 07-16-2026, 03:37 PM

Quote:

Originally Posted by Tornado1M

Ok, is the B6 just as firm?

i believe so. https://www.bilstein-shocks.co.uk/bl...nd-bilstein-b8

Tornado1M · 07-16-2026, 05:07 PM

Quote:

Originally Posted by mkeiser

i believe so. https://www.bilstein-shocks.co.uk/blogs/news/whats-the-difference-between-bilstein-b6-and-bilstein-b8

Thank you!

Looks like a minimal length difference….however, it must be the case if they manufacture them differently for stock and lowered.

demas · 07-16-2026, 05:39 PM

I wish that Bilstein article went into a little more specificity instead of just saying OE springs. I guess it was meant to be just a very high level info piece. Aren’t M-Sport springs considered OE?

In the E39 era, we used Bilstein HD’s for M-Sport springs and Bilstein Sport for anything lower like Eibach/ACS/H&R.

The HD’s were slightly taller. I wonder if they are the same or an evolved product and are now called B6 and the B8’s are the equivalent to the Bilstein Sport.

cerealwars · 07-17-2026, 05:20 PM

Looking at Rockauto, B4s are stock replacement, B6s appear to be a little stiffer but for stock ride height, and B8s are for lowered suspension plus stiffer.

Sapper · 07-20-2026, 09:56 AM

If you have msport than then either should be fine, if you have non m-sport (i think the americas only got msport as standard) then do the b6.

Fishee · 07-20-2026, 02:50 PM

B6 paired with oe non m-sport
B8 paired with m-sport or aftermarket lowering

B4 only really with oe non m-sport, soft ride, not performance oriented.

07-16-2026, 08:19 AM	#1
Tornado1M Major 1369 Rep 1,148 Posts Drives: M2cs Join Date: Aug 2018 Location: Virginia iTrader: (0)	B8 shock rear Is this only for lowered cars? Designed to enhance your car’s lowered suspension, Bilstein’s monotube gas pressure technology delivers a sporty ride with remarkable comfort. This class shock is considered by us at FCP as performance upgrade to any shock and is ideal for vehicles with a lowered stance. Last edited by Tornado1M; 07-16-2026 at 09:50 AM..
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07-16-2026, 01:33 PM	#2
mkeiser Captain 1251 Rep 782 Posts Drives: e82 128i 6mt m sport Join Date: Jan 2022 Location: Minneapolis, MN iTrader: (1)	yeah b8 should be paired with lowering springs. i can't remember if b8 can pair with m sport springs... __________________ 2011 BMW 128i 6MT M Sport - https://www.1addicts.com/forums/show....php?t=2188535
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07-16-2026, 05:39 PM	#6
demas Strictly BMW 644 Rep 264 Posts Drives: F10 550i \| E82 135i 6MT Join Date: Nov 2021 Location: Yokosuka, Japan iTrader: (0) Garage List 2013 F10 550i [9.00] 2011 E82 135i [10.00]	I wish that Bilstein article went into a little more specificity instead of just saying OE springs. I guess it was meant to be just a very high level info piece. Aren’t M-Sport springs considered OE? In the E39 era, we used Bilstein HD’s for M-Sport springs and Bilstein Sport for anything lower like Eibach/ACS/H&R. The HD’s were slightly taller. I wonder if they are the same or an evolved product and are now called B6 and the B8’s are the equivalent to the Bilstein Sport. __________________ 2013 F10 550i M-Sport \| AC Schnitzer Springs \| CMP Chassis Brace \| PS4S 2011 E82 135i M-Sport \| Evolution Racewerks CP \| Stock \| Stock \| Stock
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07-17-2026, 05:20 PM	#7
cerealwars Riffraff 743 Rep 498 Posts Drives: 128i 6M, 1UZ S13, '62 C10 Join Date: Apr 2023 Location: Detroit Metro Outskirts iTrader: (1) Garage List 2010 BMW 128i [0.00]	Looking at Rockauto, B4s are stock replacement, B6s appear to be a little stiffer but for stock ride height, and B8s are for lowered suspension plus stiffer. Attached Images
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07-20-2026, 09:56 AM	#8
Sapper Private First Class 29 Rep 110 Posts Drives: 135i 2013 Join Date: Jan 2018 Location: Canada, Saskatchewan iTrader: (0)	If you have msport than then either should be fine, if you have non m-sport (i think the americas only got msport as standard) then do the b6.
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07-20-2026, 02:50 PM	#9
Fishee Captain 1785 Rep 822 Posts Drives: 135i MSport, GLK350 Join Date: Jan 2022 Location: Toronto iTrader: (0)	B6 paired with oe non m-sport B8 paired with m-sport or aftermarket lowering B4 only really with oe non m-sport, soft ride, not performance oriented.
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