[E60525d]

Sorry to bump an old thread. But has anyone got part numbers for the Z4 rear bump stop?

Also the Z4 ones are only around 5mm shorter than OEM sport one's. Will this really make much difference?

[E60525d]

bump. Anyone???

[E60525d]

Thanks. I have the M sport suspension and looking to replace the dampers with oem Sachs.

Is it worth changing to the shorter bump stops or just get the original sport one's?

[SE7EN335]

Originally Posted by E60525d

Thanks. I have the M sport suspension and looking to replace the dampers with oem Sachs.

Is it worth changing to the shorter bump stops or just get the original sport one's?

if you are not lowering the car, no need to get the shorter bump stops. If you are, you want to maintain OEM suspension travel as you lower the car so the shorter bump stops are a very good option for that.

[E60525d]

I currently factory M sport suspension and I am looking to replace with Eibach Pro kit. Eibach have told me that it will lower the car by 10mm.

Can i use my existing bump stops or do I need shorter ones?

[Simplex123]

Originally Posted by parapaul

E36 M3 [front] 3133 2225 377
E86 Z4M [rear] 3353 6770 350

They're not handed, just buy 2 of each.

I bought these and brought it to my mechanic to install with my Bilstein B12+eibach prokit but when he installed it he said it didn't need these cuz the Bilstein has internal bump stops and told me to return it.. I feel the ride is better than stock m sport but pretty bouncy.. is it just me or would it be because these were not installed?

[Dan Bilzerian]

Can anyone confirm the height of the ZSP bumps in mm?

[streetpro]

Originally Posted by Simplex123

I bought these and brought it to my mechanic to install with my Bilstein B12+eibach prokit but when he installed it he said it didn't need these cuz the Bilstein has internal bump stops and told me to return it.. I feel the ride is better than stock m sport but pretty bouncy.. is it just me or would it be because these were not installed?

In me experience this bouncy effect is caused by progressive windup of Eibach springs and too stiff Bilstein B6 (and up their range) characteristics... notice how this gets better when pushed hard on B-roads and 50 mph+ ?
I got rid off B8 because of this (plus the front ones had failed on seals and corroded within one year).