[RiderOTStorm]

Lowering my e90 328xi this week with eibach pro-kit from europe and koni yellow

I am confused on which is the correct rear bump stop to use...
There are many posts referencing Z4M 33507836826 (first smaller pic)
I bought these and they measure 82mm in height...

Then reading along I see this one Z4 33536770350
it measures from the picture 65mm in height. (second larger pic)

So which one do I use?

[dwashy]

Originally Posted by RiderOTStorm

Lowering my e90 328xi this week.

I am confused on which is the right bump stop to use...
THere are many posts referencing Z4M 33507836826 (first smaller pic)
I bought these and they measure 82mm in height...

Then reading along I see this one Z4 33536770350
it measures from the picture 65mm in height. (second larger pic)

So which one do I use?

This looks like a bumpstop for the front? I only used Z4 bump stops for the rear. I used E36 M3 front bump stops up front when I had my Koni Yellow + HR Sport setup. The rear bumpstops I've seen have a protective sheathing that is bonded to the bump stop itself, this keeps dirt and debris out/off of the shaft and seal.

[RiderOTStorm]

These are for the rear.. They are removed from the sheathing

[dwashy]

Originally Posted by RiderOTStorm

These are for the rear.. They are removed from the sheathing

I gotcha. Pretty sure i used the Z4M ones on my setup. I don't recall, and I actually just sold it a few days ago. Depending on how low you go, maybe you'd want the standard Z4 ones.

I think the lower you go the shorter the bump stop you'd typically want. Someone can correct me if I'm wrong. If you get a spring that doesn't lower very much, then try the longer one. Rear bump stops are easy to replace relative to fronts, so you might need to resort to trial and error.

[RiderOTStorm]

The eibach kit will lower the rear from stock 20mm.
Does anyone know the height of the e90 stock rear bump stop for a sedan (not sport)?

According to Real OEM the number for the stock part is 33536767334