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      04-11-2022, 03:11 PM   #1
racer_951
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RSFB DIY - Solid Aluminum bushings

I plan to replace the RSFB with solid aluminum bushings. Based on some reading from this forum, for the Whiteline two piece bushing replacement, I don't need to drop the entire subframe. Each end can be lowered enough to press out the old ones and press in the new ones.

However, for solid aluminum bushings, someone has mentioned that I might have to drop the entire subframe because the solid bushings need to be pressed in from the top. From looking at the bushings, it doesn't seem to be the case. But I want to confirm with you guys who have done solid aluminum bushing replacements. Please let me know if I have to drop the entire subframe to install the aluminum bushings. Thanks
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      04-11-2022, 10:59 PM   #2
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I did Whiteline bushing by just lowering the subframe. I thought I was careful to not put too much stress on the short brake lines that connect over the subframe but a couple years later I noticed they were leaking and had to drop the subframe to replace them. I'd say drop the subframe.
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      04-12-2022, 12:03 AM   #3
racer_951
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Disconnecting and reconnecting the rear brakes line and bleeding the brakes are easier than dropping the subframe. If I do the bushing swap without dropping the subframe, I’d rather not.

It’s good to know that you can install white line bushings without dropping the subframe. I’d definitely consider that. Thanks
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      04-12-2022, 12:33 AM   #4
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Currently if anyone has experienced both solid aluminum and polyurethane bushings. Can you feel the difference?
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      04-16-2022, 12:14 PM   #5
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Here for the updates 👍🏼
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      04-16-2022, 02:06 PM   #6
racer_951
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I’m considering Whiteline bushings instead of aluminum given that I don’t need to drop the subframe. However, if installing aluminum bushings doesn’t require dropping the subframe, obviously I prefer aluminum. Still waiting for response from this who have done aluminum bushings installation.
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      04-16-2022, 02:10 PM   #7
racer_951
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On a separate note, the TC Kline coilovers came in yesterday. I plan to do the bushings, 1M front&rear control arms and coilovers installation all at the same time. I’m getting some help from a track buddy for the installation. Ordering the control arms next.
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      04-17-2022, 04:16 PM   #8
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Quote:
Originally Posted by racer_951 View Post
I’m considering Whiteline bushings instead of aluminum given that I don’t need to drop the subframe. However, if installing aluminum bushings doesn’t require dropping the subframe, obviously I prefer aluminum. Still waiting for response from this who have done aluminum bushings installation.
Revshift makes 2 piece aluminum bushings. I plan on using these when I do the subframe bushings. Looking to hear from anyone who has these installed and if they indeed were installed without having to completely drop the subframe, and how they are holding up.

https://revshift.com/products/billet...gs-bmw-e9x-e8x
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      04-18-2022, 07:21 PM   #9
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I went with the two piece from Condor and they’re really nice. Great fitment and quality.
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      05-05-2022, 11:10 AM   #10
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Install them as designed so you don't have any fitment issues. Putting the alum. bushings in the freezer overnight can result in them just drop right in without much effort. The bushing inserts can get you 70-80% there, not a bad upgrade for much less effort.
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      06-26-2022, 07:12 AM   #11
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Quote:
Originally Posted by racer_951 View Post
Currently if anyone has experienced both solid aluminum and polyurethane bushings. Can you feel the difference?
I originally had 75D poly RSFB and could feel a difference when I moved to solid aluminum. The poly was good, but solid was a definite improvement. The poly still had some give and caused some delayed, albeit very slight, weight transfer whereas the alum was on point and firm.

Install wasn't hard, I used a kit from ebay and was easy to press in, no need to freeze etc if the alignment is correct - it should slide in without much fuss.

I did have to lower the subframe / disconnect brake lines / bleed etc to do it correctly and without worry of ripping out my brake lines.
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      06-27-2022, 05:01 PM   #12
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Quote:
Originally Posted by 135i_Life View Post
I originally had 75D poly RSFB and could feel a difference when I moved to solid aluminum. The poly was good, but solid was a definite improvement. The poly still had some give and caused some delayed, albeit very slight, weight transfer whereas the alum was on point and firm.

Install wasn't hard, I used a kit from ebay and was easy to press in, no need to freeze etc if the alignment is correct - it should slide in without much fuss.

I did have to lower the subframe / disconnect brake lines / bleed etc to do it correctly and without worry of ripping out my brake lines.

What brand aluminum bushings did you go with?
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      06-27-2022, 09:32 PM   #13
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Quote:
Originally Posted by 135i_Life View Post
Quote:
Originally Posted by racer_951 View Post
Currently if anyone has experienced both solid aluminum and polyurethane bushings. Can you feel the difference?
I originally had 75D poly RSFB and could feel a difference when I moved to solid aluminum. The poly was good, but solid was a definite improvement. The poly still had some give and caused some delayed, albeit very slight, weight transfer whereas the alum was on point and firm.

Install wasn't hard, I used a kit from ebay and was easy to press in, no need to freeze etc if the alignment is correct - it should slide in without much fuss.

I did have to lower the subframe / disconnect brake lines / bleed etc to do it correctly and without worry of ripping out my brake lines.
Did you notice any increased NVH with the aluminum vs poly ? I'm on Whiteline bushings and there is still some movement back there but small. I'd like to eliminate that as long as it doesn't increase NVH.
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      07-09-2022, 12:14 AM   #14
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Quote:
Originally Posted by houtan View Post
What brand aluminum bushings did you go with?
I used turner - pretty sure this is same as fe1rx's choice for his
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      07-09-2022, 12:19 AM   #15
135i_Life
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Quote:
Originally Posted by fast1eddy View Post
Did you notice any increased NVH with the aluminum vs poly ? I'm on Whiteline bushings and there is still some movement back there but small. I'd like to eliminate that as long as it doesn't increase NVH.
I didn't notice any new noises stemming from the alum vs poly vs stock rsfb; just less movement in the subframe, and more direct feel with the suspension components.
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      08-26-2022, 04:51 PM   #16
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those condor bushings look nice but dang they are pricey
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      08-30-2022, 07:34 AM   #17
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Quote:
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those condor bushings look nice but dang they are pricey
Yea they're not cheap but man they went in so smoothly.
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