[dr.roro]

Originally Posted by stressdoc

The 12mm rear sway in the current version of the BMW Perf kit is not something I would bother with.

Are you suggesting to not bother with it and just leave the existing stock RSB, or would you match the [newer] BMW Performance suspension package with some other RSB? If so, which one would you suggest?

I'm looking for a decent upgrade over the stock ZSP setup, but something that will maintain the factory warranty and not be too harsh/stiff for daily driving.

[stressdoc]

Originally Posted by dr.roro

Are you suggesting to not bother with it and just leave the existing stock RSB, or would you match the [newer] BMW Performance suspension package with some other RSB? If so, which one would you suggest?

I'm looking for a decent upgrade over the stock ZSP setup, but something that will maintain the factory warranty and not be too harsh/stiff for daily driving.

The cheap thing is to stay with the OEM 13mm rear sway. If you are planning a modest increase in suspension performance, a 14 or 15mm rear sway in combo with the Perf front sway should provide reasonable balance for a DD. If you are going further, the M3 sways (front and rear) are a good option.

[John_01]

Originally Posted by stressdoc

The cheap thing is to stay with the OEM 13mm rear sway.

I thought that is what is supposed to happen when you order e90 performance suspension. As far as I know the new kits don't include any rear sway bar at all. I read that there used to be a 14mm bar included, but I never heard of a 12mm. I could be wrong.. if so please don't hesitate to say so.

I say this based on the info listed here:
http://www.trademotion.com/partlocat...4462&tab=27626

[stressdoc]

That (keep OEM 13mm rear sway) is the current BMW NA set up (e.g., see Tischer). The initial version of the 'new kit' in Euro recommended changing the 14mm M-sport to a smaller 12mm sway. Evidently the tuners want to keep a fair bit of understeer.

[shochu75]

I just took my car up to the mountain to do a little spirited driving, and the car does have a tendency to understeer with the DSC on. It's not major understeer, but enough to make me want to try to get a hold of the 14mm rear sway. I MISS MY EVO VIII! lol the 335i is really heavy!

[TurboBimmer]

Does anyone have the Euro spec Performance suspension Kit on a car with 19" RFTs? How's the ride quality? I don't want the car to bounce around as it's already quite stiff.

I'd like to stay with OEM parts. Unfortunately the perf. suspension is not adjustable.