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Front Sway Bar Option

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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spitfun
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Front Sway Bar Option

Post by spitfun » Sat Feb 04, 2023 3:40 am

Just want to give you guys a headsup that a front sway bar for a e90,e92 and e93 335i will fit our cars. I just installed and it and all went well-I bought my bar from ECS Tuning (house brand) because all the other bars were on backorder (including H&R) and they have them in stock. I hope this helps others looking for a front bar.
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2012 Z4 Sdrive35i M Sport manual

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B21
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Front Sway Bar Option

Post by B21 » Sat Feb 04, 2023 2:34 pm

Good write up :thumbsup:

The E90 front end is relatively easily transferable to the E89 in parts…pity the E89 ended up with the E85 design back end…

I assume the new bar is stiffer?

That will make the car understeer more..is that what you wanted?
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is :thumbsup:

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Front Sway Bar Option

Post by spitfun » Sat Feb 04, 2023 2:46 pm

I am waiting for the rear bar to come in to balance out the rear. Unfortunately,the H&R is backordered until April-May,that's why I looked for an alternative to the front,as far as I know the rear is specific to the E89 unless someone knows of another series that works.
2012 Z4 Sdrive35i M Sport manual

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B21
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Front Sway Bar Option

Post by B21 » Sat Feb 04, 2023 2:54 pm

spitfun wrote: Sat Feb 04, 2023 2:46 pm I am waiting for the rear bar to come in. Unfortunately,the H&R is backordered until April-May,that's why I looked for an alternative to the front. as fas as I know the rear is specific to the E89 unless someone knows of another series that works.
AFAIK the E89 rear end is almost unique…although conceptually it’s a near identical design of the E85 almost all the parts are unique due to the wider rear track of the E89..

I’m just experimenting with the RTAB assembly as that’s got some parts in common ..

I want to improve toe in control with stiffer RTAB bush assemblies..
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is :thumbsup:

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Front Sway Bar Option

Post by spitfun » Sat Feb 04, 2023 3:00 pm

I also bought the stiffer RTAB bushes for mine,when I install the rear bar I will tackle those....
Last edited by spitfun on Sat Feb 04, 2023 3:31 pm, edited 1 time in total.
2012 Z4 Sdrive35i M Sport manual

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Front Sway Bar Option

Post by B21 » Sat Feb 04, 2023 3:03 pm

spitfun wrote: Sat Feb 04, 2023 3:00 pm I bought the stiffer RTAB bushes for mine,when I install the rear bar I will tackle those....
Which bushes did you purchase ?
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is :thumbsup:

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Front Sway Bar Option

Post by spitfun » Sat Feb 04, 2023 3:17 pm

Lemforder 13208's with the necessary spacers.
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2012 Z4 Sdrive35i M Sport manual

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Front Sway Bar Option

Post by Marcoose » Sat Feb 04, 2023 5:57 pm

B21 wrote: Sat Feb 04, 2023 2:34 pm I assume the new bar is stiffer? That will make the car understeer more..is that what you wanted?
Same question here.
2016 35is, monoballs, camber plates, KWV3, PS4S, xHP, MHD, LFB pedal, flat bottom wheel, red indicators, black headlamps
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Front Sway Bar Option

Post by B21 » Sat Feb 04, 2023 9:09 pm

spitfun wrote: Sat Feb 04, 2023 3:17 pm Lemforder 13208's with the necessary spacers.
20230204_091253.jpg
That looks like one of the two bushes on the linkages at the back of the trailing arm..not the main pivoting trailing arm bush?
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is :thumbsup:

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Front Sway Bar Option

Post by spitfun » Tue Feb 07, 2023 12:36 pm

Sorry,wrong pieces! All the parts are Lemforder though...
2012 Z4 Sdrive35i M Sport manual

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