2007 Z4 coupe Stiffer springs?

[rocky79]

Hello,

I am looking to reduce the body roll on my 2007 Z4 coupe W sport suspension. ( 153,000 miles)
I already installed Koni Yellow Shocks.

My question is will the Eibach pro Springs E10-20-010-04-22 work well? Tuner shop says that they are for the Z4M Coupe and will not fit my car.
I don’t want aggressive lowering, only 20mm Front, 10mm rear. The ones for the Z4 coupe have pretty aggressive lowering.

Has anyone tried them on a stock Z4 coupe? Any recommendations is appreciated
https://www.tunershop.com/eibach-spr...5-pro-kit.html

[B328iC]

To reduce body roll you should look at larger sway bars.

[cbpip]

Paired the Eibach pro springs with Bilstein B8 shocks (B12 set up) they work great at helping ride quality and cornering. Also added a Ground control front medium anti sway bar. One thing you need to be aware of is a stiffer front anti sway bar will weaken and rip out the mount on the front frame if your going to do any aggressive driving. Frame mounts will need to be reinforced. Added a 15mm rear spring perch pad to have it sit level in the rear otherwise it sits lower in the rear. Also added the reinforcement plates to the front shock towers to keep them from mushrooming. Don't forget to use rear shock mount reinforcement mounts. Rouge engineering sells them.

[rocky79]

Originally Posted by B328iC

To reduce body roll you should look at larger sway bars.

I am looking at the Z4M 27mm SwayBar. It looks the same as the non-M Z4C but thicker. Do you know if it will actually fit?

Mine has the 25mm factory SwayBar ( sport suspension)

[rocky79]

Originally Posted by cbpip

Paired the Eibach pro springs with Bilstein B8 shocks (B12 set up) they work great at helping ride quality and cornering. Also added a Ground control front medium anti sway bar. One thing you need to be aware of is a stiffer front anti sway bar will weaken and rip out the mount on the front frame if your going to do any aggressive driving. Frame mounts will need to be reinforced. Added a 15mm rear spring perch pad to have it sit level in the rear otherwise it sits lower in the rear. Also added the reinforcement plates to the front shock towers to keep them from mushrooming. Don't forget to use rear shock mount reinforcement mounts. Rouge engineering sells them.

I am only going to look into the front swaybar for now. I am checking if the Z4M front swaybar will fit.
Do you think i need anything else to start?

[B328iC]

Originally Posted by rocky79

I am looking at the Z4M 27mm SwayBar. It looks the same as the non-M Z4C but thicker. Do you know if it will actually fit?

Mine has the 25mm factory SwayBar ( sport suspension)

I put the H&R #72276 sway bar kit on mine. Its a 27mm front & 21mm rear in it. They bolted up just fine. I love the way it handles with them. If you are upgrading I would do both as it will change the way the car corners.

[rocky79]

Originally Posted by B328iC

I put the H&R #72276 sway bar kit on mine. Its a 27mm front & 21mm rear in it. They bolted up just fine. I love the way it handles with them. If you are upgrading I would do both as it will change the way the car corners.

Thanks for sharing, did you feel the undesteer associated with the stiffer swaybar?
Any cons you have experienced?

[B328iC]

Originally Posted by rocky79

Thanks for sharing, did you feel the undesteer associated with the stiffer swaybar?
Any cons you have experienced?

No issues yet. Feels more stable in the corners. I did replace both to try to limit the understeer. I now have a tendency to push the car closer to the tires limits though.

[rocky79]

Originally Posted by B328iC

I now have a tendency to push the car closer to the tires limits though.

As long as you’re not loosing grip .
The car is very grippy stock