[playswcars]

FWIW, HawaiiG80Green has front Eibachs on his car. Would you still recommend them?

[somer]

Originally Posted by papasmurf_m4cs

Similar experience here.

When I had VTF on my F80 M3 it rode very well but, no longer felt planted. to be fair I went from a very track focused swift spec R springs which handled the best I ever felt in a car. Razor sharp but rode like shit hurt my back and was too low. It was slammed and too much rake I never loved it. But, I loved the handling. Went to VTF more compliant but, as you mentioned handling went to shit. Maybe because I went from full track springs to full street idk but, it felt floaty was not confidence inspiring. Also I had it raised to nearly its highest setting and it was still quite low but, ok. So idk if that made a difference in handling.


I don't really want to go coilovers on this car just to have a better stance. But, I don't want to sacrifice spring rate on the CS just for better stance either. I might have to it appears.

I would go MCS or Ohlins for handing. But, I don't want to put coilovers on this car. At least not right now. With coilovers you can go lower and by default the highest setting might still be quite low. Lower than say an eibach pro kit which is just slightly lower than stock giving a nice oem+ look and feel.

All the springs are mostly likely all going to be based around the competition not a CS specific spring.

CSL springs would be 8mm lower all around if you wanted to go that route but they made those for a vehicle thats ~200lbs less than the M4cs, not sure what difference it would make really.

The Carbahn HAS kit would be one I would look at also.

[papasmurf_m4cs]

Originally Posted by playswcars

FWIW, HawaiiG80Green has front Eibachs on his car. Would you still recommend them?

Think that's only a thing with G80 not G82. Not sure which you have?

Originally Posted by somer

CSL springs would be 8mm lower all around if you wanted to go that route but they made those for a vehicle thats ~200lbs less than the M4cs, not sure what difference it would make really.

The Carbahn HAS kit would be one I would look at also.

That's nice heavier car and stiffer might not be as bad of a ride as lighter car and stiffer springs I heard CSL is a very harsh ride. But it should be so should a CS to a certain degree.

Carbahn is nice I wonder what his springs rates are I will call them tomorrow.

[HawaiiG80Green]

Originally Posted by playswcars

FWIW, HawaiiG80Green has front Eibachs on his car. Would you still recommend them?

Solid for me but mainly for the g80 as the front is higher. Not sure about the m4’s

[Learning2]

Maybe I'm missing reading this thread, but I cannot find any springs for a 2025 BMW M4 CS.

Can you all point me in the right direction to find springs that would lower the car a bit?

[RichardGM4]

Originally Posted by Vic55

Its not just you --- the rear of the M3 CS definitely has a less fender to tire measurable gap.

But even my m3 felt high like Tommy Chong:

AFTER:



BEFORE:

100% the M3 CS is lower all round out of the factory than the M4 CS (same applies to the Comp models I think)

I always found my G82 M4 CX way too high, especially at the front but my G80 M3 CS is fine for me - I could do with dropping the front slightly (10mm maybe) but after the disaster I had when I lowered the G82 I’m not touching this one’s suspension setup

[papasmurf_m4cs]

Originally Posted by Learning2

Maybe I'm missing reading this thread, but I cannot find any springs for a 2025 BMW M4 CS.

Can you all point me in the right direction to find springs that would lower the car a bit?

I'm in the same boat. I
Considering coilovers now. I do t think anyone makes a spring for CS.

[papasmurf_m4cs]

Called eibach and they said the pro kit spring rates are:

251 lbs in front and 388-857 lbs progressive rears.

Stock M4 comp has 198 lbs front and 685 lbs rear.

So that should be an improvement with the eibachs even for a CS.


I don't want to slam the car just a little lower oem+ without sacrificing the brilliant handling.


I called KW and they don't know because Germany does not give out that info. They did say it should be stiffer than stock just not sure how much exactly.


I'm deciding between eibach pro kit which gives a mild drop right about where I want it anyways vs the KW has. I just don't know if the spring rates are as high as the eibachs.

I'm thinking the eibachs will handle better vs KW that can go lower. IDK.

[Learning2]

Originally Posted by Vic55

My M4 CS was 4x4 ready pre drop ....

MSS Hybrid System (no issues, no problems, all good) and rather compliant over the trash roads yet still flat enough to not spill my drink in the fake cupholder.

MPP HAS maxes out at 20mm- I had it on my 2025 M4 Comp and the gap was ehhh... M4 just has that higher cowl. You can go KW though and get that drop you want plus KW makes MPP if that makes one feel better.

After







Before

I don't see the CS listed on their website, it will still work?

[Learning2]

Originally Posted by tom @ eas

The KW would be the more popular of the two, as it's the official supplier for M Motorsport and has been on the market the longest.

https://www.kwsuspensions.com/bmw-motorsport

I have the KW HAS kits in stock when ready. AST is also a good alternative and will lower the car a bit more, with a more OEM driving feel.

AST doesn't have the 2025 BMW M4 CS listed. Will they still work?

[Vic55]

Originally Posted by Learning2

I don't see the CS listed on their website, it will still work?

Yes Ive used KW on my M3CS and the MSS hybrid on the M4CS with zero issues.

MSS is OOB so I would suggest KW.

[tom @ eas]

Originally Posted by Learning2

AST doesn't have the 2025 BMW M4 CS listed. Will they still work?

Both AST and KW are both compatible with CS. We just got our restocking order of AST, so we have both AST and KW in stock on the shelves.

Feel free to send me a PM if you need more info.

[MJBO]

Originally Posted by papasmurf_m4cs

I would. MP Has seem to be for competition spring rates on the F80 so I assume its the same for G82.

I dont want to go softer than what the car comes with.

Also HAS kits drop pretty low. Even the default height seems to be pretty low. I had to raise my car up almost all the way to the limit and it still dropped my F80 quite low.

I do not want that for the CS.

MPHAS is a max 20mm drop, minimum 10mm. If you're wanting less than that, not sure why you're bothering to lower at all.

My M3T was set at a 15mm drop, and that looked about perfect to me.

All that said, if you're not really wanting to lower all that much, I'm not sure why you'd want to mess with the standard CS setup? Surely it's one of the reasons to spend all the extra on the CS over Comp.

[papasmurf_m4cs]

Car is settled in and sitting on the eibach pro kit. Drives a bit more comfy not sure about track yet I will find out!

Wheel gap reduced but not eliminated that's what I wanted.

The initial turn in at low speeds is not as darty as the stock CS springs. Kinda miss that tbh.

Everything is a trade off it looks perfect stock was just a bit too high for me.

I love it how turned out no rubs no hackathon on the fender vents either with spacers!

Gotta love the CS for that. Everyone said it was gonna rub. None lock to lock.

[Giak]

Originally Posted by papasmurf_m4cs

Car is settled in and sitting on the eibach pro kit. Drives a bit more comfy not sure about track yet I will find out!

Wheel gap reduced but not eliminated that's what I wanted.

The initial turn in at low speeds is not as darty as the stock CS springs. Kinda miss that tbh.

Everything is a trade off it looks perfect stock was just a bit too high for me.

I love it how turned out no rubs no hackathon on the fender vents either with spacers!

Gotta love the CS for that. Everyone said it was gonna rub. None lock to lock.

Hi, how do you find yourself with Eibach ProKit after a few months driving? How much lower than stock is it sitting? I don't care about wheel gap, I just want to know if during spirited driving it drives better, worse or the same. Thanks

[papasmurf_m4cs]

I don't drive it daily or that often maybe 3-4 times a month. It feels great. More complaint for street use. Maybe not as good for flat out at the track I don't know yet but I'm taking to a trackday and will report back.

Initial feels a bit softer for daily but again don't know at its limits yet. Looks amazing so I love it. Rides great feels good.

I think I mentioned prior it might have lost that initial dartyness as stock the initial turn in at low speeds. Not as stiff. I'd say marginally softer but they should be progressive rates so as you push them the rates gets stiffer.

A suspension expert can chime in but in theory is how it sounds so I bought into that.

The guy from eibach said it should feel more compliant daily give you the look and as you push the car the rates increase to "theoretically stock CS or stiffer actually"

I haven't tested that last part yet.

[Giak]

Thank you! They look perfect, not too low. Probably your CS has stiffer OEM springs compared to competition models, so you feel the eibachs a bit softer.
I am not a fan of progressive springs.
I don't want the discomfort of being lower and touch the exhaust on garage ramps, taking the risk the springs will not improve my driving experience or vehicle dynamic. Actually theee is a risk the original dampers will not perform as good as with oem springs. I will probably leave the stock springs until I move to a coilover setup.

[papasmurf_m4cs]

Originally Posted by Giak

Thank you! They look perfect, not too low. Probably your CS has stiffer OEM springs compared to competition models, so you feel the eibachs a bit softer.
I am not a fan of progressive springs.
I don't want the discomfort of being lower and touch the exhaust on garage ramps, taking the risk the springs will not improve my driving experience or vehicle dynamic. Actually theee is a risk the original dampers will not perform as good as with oem springs. I will probably leave the stock springs until I move to a coilover setup.

I thought the same I told myself that too but after a while it he car sits really high stock like a 4x4 and specially xdrive M4. So I could not take it anymore I spoke to KW Eibach and few orhers.

CS has 3% and 5% stiffer than competition spring rates.

Eibach said it's its progressive and goes up to like 10-15%. Or hat seemed beneficial and it looks phenomenal handles great. I said why not.

I've had eibach pro kit on previous M3 and loved it. They are a very reputable brand that does a lot of testing. I'm good with my choice.


They feel marginally more complaint at slower speeds not much car still feels stiff as it came from the factory it just looks better.

Car doesn't feel sloppy or scrapes or anything like that it's very sharp and probably not that noticeable to most people, they won't be able to tell a difference just that it doesn't sit so high anymore.

I stopped over thinking it was stressing me. I love it no plans to change to coilovers for now. To each is own.

[Giak]

Happy to hear that your are enjoying the new springs and the new setup.
Do you usually drive fast and push the car to its limits (not in a stright line I mean, but in turns)? I would like to hear your impressions and how the car handles in this situation with eibachs. does it remain predictable or lose of grip is more immediate?
Thank you

[papasmurf_m4cs]

Car feels great nice an planted I see or feel no loss in grip.

So far so good!

[G80M3CS]

[QUOTE=Vic55;32143562]
Question, did you notice any negative handling differences after putting the CS on lowering springs? Im debating whether to lower my CS but i dont want to compromise performance for aesthetics.

[papasmurf_m4cs]

Here it is all settled in. I think it sits perfect 👌 what do you guys think?