F80 M3 / F82 M4 Brake Caliper/Rotor Retrofit Guide to E9x M3 - Using OEM Parts

[gmx]

Should fit, there are ppl running a bigger 6p caliper with 380mm disc and no problems with the 359M wheels.

Can someone please measure the F8x front disc (380mm) lug hole diameter?

[gmx]

Further, the OE flat hex bolt for the wheel bearings is 60mm in length. Wouldn't the recommended 45mm length ball seat if using E9x wheel hubs be too short??

Edit: compared some pics of where the bearing seats on each spindle and how much of the fastener shank protrudes, plus if there's any differences in thickness of the hub's mating surface to spindle surface. The F8x, along with ball seat is much deeper hence why a 10mm (or 15mm, realoem specifies both a 55 or 60mm for E8x/E9x M) shorter bolt works fine. Also, early F8x can be 1.5mm thread as well. There was a split around 2017, best to test with what hub you currently have. if new, they should accept be 1.25mm thread.
I wonder if anyone doing this also checked their track widths and ofc camber/caster with the standard upright part numbers.

[TigerM3]

I'm about to install F80 rear calipers and rotors. I will be replacing the rubber outer brake lines while I'm at it. Does anyone know the torque specs for each end?

[MineralWhiteF80]

Originally Posted by TigerM3

I'm about to install F80 rear calipers and rotors. I will be replacing the rubber outer brake lines while I'm at it. Does anyone know the torque specs for each end?

Here is what the ISTA torque table shows for F80 brake caliper/hose torques:

EDIT: and remember to properly adjust the your crowsfoot socket at 90* to the torque wrench head to get the correct amount of torque

[TigerM3]

Originally Posted by MineralWhiteF80

Here is what the ISTA torque table shows for F80 brake caliper/hose torques:

EDIT: and remember to properly adjust the your crowsfoot socket at 90* to the torque wrench head to get the correct amount of torque

Thank you sir!

[drwankel]

How much ride height is added by switching to the f8x front hubs? Someone mentioned it increased, but not clear how much.

[tdott]

Originally Posted by drwankel

How much ride height is added by switching to the f8x front hubs? Someone mentioned it increased, but not clear how much.

It's on page 2.
https://www.m3post.com/forums/showpo...8&postcount=32

[For3]

I am thinking of doing this swap. Can anyone confirm if these will work with OEM M359 wheels? I happen to run a square set up with 19x10ET25 at all for corners.

Thanks in advance for confirmation. I am scheduled to pick up a set this weekend but will pass if they won't work with my wheels.

[M3SQRD]

Originally Posted by For3

I am thinking of doing this swap. Can anyone confirm if these will work with OEM M359 wheels? I happen to run a square set up with 19x10ET25 at all for corners.

Thanks in advance for confirmation. I am scheduled to pick up a set this weekend but will pass if they won't work with my wheels.

Below is a picture showing a larger Brembo 6-piston caliper with stock rotor fitting behind a 359M wheel. If this clears then the F8x blue Brembo 4-piston caliper will fit behind a 359M wheel.

[M3SQRD]

Originally Posted by gmx

Should fit, there are ppl running a bigger 6p caliper with 380mm disc and no problems with the 359M wheels.

Can someone please measure the F8x front disc (380mm) lug hole diameter?

Are you talking about the 5x120 bolt circle? The smaller bolt circle started with the G generation cars, F8x still uses a 5x120 mm bolt circle (but 14x1.25 lug bolts) and 72.56 mm hub diameter.

[For3]

Originally Posted by M3SQRD

Below is a picture showing a larger Brembo 6-piston caliper with stock rotor fitting behind a 359M wheel. If this clears then the F8x blue Brembo 4-piston caliper will fit behind a 359M wheel.

Thanks. I happened to find 2 threads on F80 bimmerpost showing M359 wheels on the F8X M3 / M4 chassis:


https://f80.bimmerpost.com/forums/sh....php?t=1437911

and

https://f80.bimmerpost.com/forums/sh...highlight=M359

And these 2 blog posts showing F8X M3/M4 brakes on the E9X M3 chassis:

https://www.expressivedrives.com/blog/f8x-brakes-to-f9x

and

https://www.expressivedrives.com/blo...e-set-and-back

I found a great condition set (20k miles, non tracked) of F80 calipers, rotors, and pads locally for a good price and have gone ahead and purchased them. Plan to put them on this Spring.

[OmairK]

Im thinking to change my rear wheel bearings and hub and upgrade to the F8X M3 including rear dust shield. I want to confirm the following:
1) rear dust shield from F8X is plug and play to our rear wheel carrier?
2) should I get new parking brake pads from F8X or E9X M3?
3) is the rear wheel bearing and hub from the F8X compatible with our E9X M3 carrier? Or do I get the bearing from the E9X M3 and the hub from the F80…

Thanks in advance!

[Oscar_Call]

Originally Posted by OmairK

Im thinking to change my rear wheel bearings and hub and upgrade to the F8X M3 including rear dust shield. I want to confirm the following:
1) rear dust shield from F8X is plug and play to our rear wheel carrier?
2) should I get new parking brake pads from F8X or E9X M3?
3) is the rear wheel bearing and hub from the F8X compatible with our E9X M3 carrier? Or do I get the bearing from the E9X M3 and the hub from the F80…

Thanks in advance!

I am doing the same brake swap to F80 brakes all around. A guy in the M3Post watsapp group sent me this link: https://epytec.de/en/bmw-3er-e92-e93...p7Mtp5fICctJs4

Not answering all those questions because I do not know but by going with the adapters feels like you can skip solving a few of them

[maddmatth]

Hi guys. I notice there are some brackets that for the non-M cars that allow them to fit these brakes without having to get the spindles.

Does anything similar exist for the M3?

I found this which seems to be what I'm looking for
https://epytec.de/en/bmw-3er-e92-e93...0-4-piston-694


But it says you need the F30 M performance caliper, not the F80??? That's weird because from some googling those appear to be the same part.

Has anyone here tried that? Any reason why it might be better to use the F80 spindles?

[Track/S]

F82 AP BBK on e92

[tdott]

Originally Posted by Track/S

F82 AP BBK on e92

F8x Spindles up front?

[Track/S]

Originally Posted by tdott

F8x Spindles up front?

Yes spindles and hubs.

[tdott]

Originally Posted by Track/S

Yes spindles and hubs.

Nice, if a front only set ever pops up I might upgrade my f8x fronts.

[Track/S]

Originally Posted by tdott

Nice, if a front only set ever pops up I might upgrade my f8x fronts.

I could install the brakes with the OEM spindles, I decided to use f82 spindles and hubs to be able to install m14 studs of m4 gt4 and the rims.

[tdott]

Originally Posted by Track/S

I could install the brakes with the OEM spindles, I decided to use f82 spindles and hubs to be able to install m14 studs of m4 gt4 and the rims.

Yea same, but I don't want to switch back.

You can install the f8x front wheel bearings to get M4 studs and hubs without the f8x spindle btw

[Track/S]

Originally Posted by tdott

Yea same, but I don't want to switch back.

You can install the f8x front wheel bearings to get M4 studs and hubs without the f8x spindle btw

I had a set of spindles and hubs, I didn't want to separate them

[gmx]

Do you track it? Notice anything with the F8x spindles/hubs?
Initially I thought they'd improve geometry, now I think it's the ... opposite.
The "real" geo improvement on the F8x is from the increased length in lower front arm (not the thrust arm, the other one). This moves the virtual pivot and probably increases KPI.

I'm hearing static install of these spindles from factory cars is increasing camber 0.5 negative and height about 8-10mm. Height is well known about. The camber is a bit confusing despite old mate measured that the angle the strut inserts is the same. These measurements were taken without the "camber correction" pieces btw (you can either get 0.5 negative, or 0.5 positive, there are 3 total PNs).