2011 135i Suspension upgrade advice

[BavarianBurble]

I recently picked up a 2011 135i DCT with lots of performance mods but no suspension mods. The rear shocks need replacing so I thought while that is being done how can I improve the handling? I want to make the vehicle tighter as overall it feels loose compared to my old E92 M3. This will not be tracked just a daily driver so no extreme upgrades are required.

Performance Mods:
MHD Stage 2+ tune on 91 octane (~400hp)
AFE Power cold air intake
Upgraded front-mount intercooler
Upgraded inlet chargepipe
Catless downpipe
CSF performance radiator
Other: * ENKEI PF01 lightweight wheels

I was thinking of the following.

Bilstein B12 2012 BMW 135i Base Coupe Front and Rear Suspension Kit - 46-180537
Whiteline 07-11 BMW 328i / 07-11 BMW 335i Front Lower Control Arm - KTA255
Eibach 15mm Rear Anti-Roll-Kit for 06-10 BMW E90 325i/328i/330i Sedan / 07-10 BMW E82 135i - 2085.312

[ml26]

Can’t go wrong with a bilstein pro kit.

Rear subframe bushings should be at the top of your list after the springs and dampers.

Check for worn control arm bushings, etc.

[blnk-128]

Bilsteins should be good, RSFB ideally or inserts are a must for controlling the rear end. On the street you won't need much else. RSFB and rear roll bar could be done at the same time to save on labor since both require lowering and/or dropping the subframe.

M3 front arms make a big difference from both bushing stiffness and camber, other than that I wouldn't go crazy. Front arms can be done independently as they don't require any disassembly to access.

My priority list would be

1. RSFB
2. M3 Front Control Arms
3. Shocks/Struts

[tomdevere@gmail.com]

Need to replace my stock shocks....car has m sport suspension option
love some moderate $ ideas

[h1pst3r88]

I did the Bilstein B14 kit with all new top and bottom shock mounts all around, new control arms, and new tires. The car handles like it’s on rails with 93k miles. It’s firm but not crazy. I think I paid $800 last fall for the B14 coilover kit from Tire Rack.

[E82dude1]

Total suspension upgrade in progress...75k miles

Done-
Meyle M3 control Arms, Bilstein B6 Struts, Meyle HD Tie Rod Ends and Sway Bar End links & new bushings, all hardware/mounts replaced, no other plans for the front end.


Next is the rear, Bilstein B6 shocks/mounts, Meyle M3 control arms, Revshift Trailing Arms w/ Monoball joints, Sway Bar end links & bushings, Whiteline Rear Subframe Bushings, and all new hardware, etc.