[DT Fan]

Hey all,

The rear struts went in my car went out, and I have been having an annoying vibration at speed for a while. As such, I am looking to do some upgrades while I'm fixing the issues.

My current thinking is as follows:

Koni Yellows all around
Eibach Pro Springs - Front
BMW Sport Springs - Rear (to address the rake issues with going Eibach's all around)
Custom front thrust arms with bearings from Syncro Design Works
BMW OEM outer ball joints

Does anyone have additional recommendations? Should I be replacing the lower control arms? Any bushings? Any parts in the rear?

I am looking for a ride that is more direct than factory and slightly lower, but not too harsh. This car is mainly a DD. For those reasons, I ruled out H&R springs and I feel coilovers are too much for my needs.

[Chief Orman]

Originally Posted by DT Fan

Hey all,

The rear struts went in my car went out, and I have been having an annoying vibration at speed for a while. As such, I am looking to do some upgrades while I'm fixing the issues.

My current thinking is as follows:

Koni Yellows all around
Eibach Pro Springs - Front
BMW Sport Springs - Rear (to address the rake issues with going Eibach's all around)
Custom front thrust arms with bearings from Syncro Design Works
BMW OEM outer ball joints

Does anyone have additional recommendations? Should I be replacing the lower control arms? Any bushings? Any parts in the rear?

I am looking for a ride that is more direct than factory and slightly lower, but not too harsh. This car is mainly a DD. For those reasons, I ruled out H&R springs and I feel coilovers are too much for my needs.

Ohlin coilovers instead of your shock spring setup.

[wdeerfield]

Originally Posted by Chief Orman

Ohlin coilovers instead of your shock spring setup.

pretty sure those wont work with an xi and he stated coilovers are out as an option

[Antetokounmpo]

Originally Posted by Chief Orman

Ohlin coilovers instead of your shock spring setup.

"coilovers are too much for my needs"

and you recommend ohlins? ok. lol.

not to mention, they don't even make an xi version

[soldado331]

I did a suspension refresh on my e90 this past summer and I'm very happy with the results. This is what was upgraded:
-rear m3 e93 sway bar
-koni yellows all around
-powerflex yellow rear subframe bushings (f&r positions)

With these changes alone the car rides more planted and rolls much less through turns. I kept the stock springs since I like the car's height as is with 18" wheels and its my daily driver. The ride is still comfortable and much more fun to drive.

Best of luck.