[Super6]

I have a 2012 535xi........... of course it handled like a boat, I have lowered it (H&R springs) , and replaced the front sway bar with a M5 sway bar. Huge difference almost night and day. However, its still not how I want it. I know it will never handle like my E60.

I am thinking I should change my rear sway bar as well. I have researched and I keep seeing the 650i sway bar may work. Is there a specific year? or part code? Any other suggestions would be appreciated.

[Boss330]

There's allready a long thread on this subject in the suspension section:

http://f10.5post.com/forums/showthread.php?t=717144

I recently installed the M5 Comp Pack front sway bar and M550d rear sway bar. Excellent combo, see the other thread for more detailed review

[valbmw]

You may want to consider the H&R front and rear sway bars http://www.hrsprings.com/application...ts/4/1303/2012 They look and feel stiffer then any BMW ones. I hope not too much, to avoid converting the car into a hard trolley)

[Boss330]

Originally Posted by Valery.BMW

You may want to consider the H&R front and rear sway bars http://www.hrsprings.com/application...ts/4/1303/2012 They look and feel stiffer then any BMW ones. I hope not too much, to avoid converting the car into a hard trolley)

Do you have any info on stiffness of the H&R bars relative to the M5 and M5 Comp Pack sway bars?

External diameter differences between H&R and the M5 bars might not mean that there is the same relative difference in stiffness...

[valbmw]

You are right, the thick bars can be made from another steel and with different technology that really matters to physical properties.
And no, I never intended to compare CP to H&R because already got a set of M5/650i. Other members can choose what they believe fits better.

Part numbers for all BMW:
1. M5 front sway bar: 31 35 2 284 460
2. M5 Competition front sway bar: 31 35 7 850 119
Both are 26mm on center area, side area is 30mm, but competition front center area 26mm is just shorter than normal M5.

3. M550dx/650ix rear sway bar: 33 55 6 791 932
plus Bushings, two: 33 55 6 788 630

Fronts: 24mm (stock) --> 26mm (M5)
Rear: 14mm (stock) --> 16mm (M550d/F13)

Picture of H&R set:

[Boss330]

Originally Posted by Valery.BMW

You are right, the thick bars can be made from another steel and with different technology that really matters to physical properties.
And no, I never intended to compare CP to H&R because already got a set of M5/650i. Other members can choose what they believe fits better.

Part numbers for all BMW:
1. M5 front sway bar: 31 35 2 284 460
2. M5 Competition front sway bar: 31 35 7 850 119
Both are 26mm on center area, side area is 30mm, but competition front center area 26mm is just shorter than normal M5.

3. M550dx/650ix rear sway bar: 33 55 6 791 932
plus Bushings, two: 33 55 6 788 630

Fronts: 24mm (stock) --> 26mm (M5)
Rear: 14mm (stock) --> 16mm (M550d/F13)

Picture of H&R set:

Thanks for the info