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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Suspension | Chassis | Brakes > F80/82 M3 M4 factory brakes on F30 335i - ????
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      08-03-2020, 10:30 PM   #45
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you need to verify the back of the front 4 piston front calipers to ensure it states the following:

380/370mm

the rear two piston brembo calipers are all the same M Sport across all lines (235i/335i/340i/M2/M3/M4)

I did the conversion as well:


Last edited by sqwinny; 08-03-2020 at 11:36 PM..
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      08-03-2020, 10:33 PM   #46
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Quote:
Originally Posted by Logicoeur View Post
The m235i comes with these so just wrong on the M3/m4 part.
Please read the back. the "caliper is the same as well as the pads" however the mounts are different (longer, look and compare the amount of metal from caliper to bolt holes) from the m235i compared to the m3/m4. This allows for a different sized rotor to be installed.
340mm caliper (pistons, pads and surface area) are the same as the M-Sport package but not M Sport Performance Package which allows for a larger rotor. It's clearly marked and I hope whoever searches for this in the future understands this marking to not get mixed up.

rear of M Sport calipers stamped for 340mm taken from the linked eBay listing previously:



rear of M3/M4 stamped for 370/380mm:


Last edited by sqwinny; 08-03-2020 at 11:54 PM..
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      08-03-2020, 11:31 PM   #47
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You guys are awesome, I greatly appreciate the words of knowledge!
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      08-03-2020, 11:58 PM   #48
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Quote:
Originally Posted by sqwinny View Post
Quote:
Originally Posted by Logicoeur View Post
The m235i comes with these so just wrong on the M3/m4 part.
Please read the back. the "caliper is the same as well as the pads" however the mounts are different (longer, look and compare the amount of metal from caliper to bolt holes) from the m235i compared to the m3/m4. This allows for a different sized rotor to be installed.
340mm caliper (pistons, pads and surface area) are the same as the M-Sport package but not M Sport Performance Package which allows for a larger rotor. It's clearly marked and I hope whoever searches for this in the future understands this marking to not get mixed up.

rear of M Sport calipers stamped for 340mm taken from the linked eBay listing previously:

[IMG]
View post on imgur.com
[/IMG]

rear of M3/M4 stamped for 370/380mm:

[IMG]
View post on imgur.com
[/IMG]
You are repeating everything I just posted to me, but ok.

As I said the listing is wrong about M3/M4 applications just for the front. They technically WPULD still bost on, but you'd need custom sized rotors at 350mm (340+10). Brake bias would also be effected.

Anyway good luck op.
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      08-04-2020, 12:10 AM   #49
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Quote:
Originally Posted by Logicoeur View Post
You are repeating everything I just posted to me, but ok.

As I said the listing is wrong about M3/M4 applications just for the front. They technically WPULD still bost on, but you'd need custom sized rotors at 350mm (340+10). Brake bias would also be effected.

Anyway good luck op.
This is where you would be incorrect. You only need stock 335i/340i 340mm rotors with the 4 piston 340mm calipers (unpainted grey or M Sport Blue painted). The calipers will bolt on no issues at all and no brackets are required.
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      08-04-2020, 12:30 AM   #50
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Quote:
Originally Posted by sqwinny View Post
Quote:
Originally Posted by Logicoeur View Post
You are repeating everything I just posted to me, but ok.

As I said the listing is wrong about M3/M4 applications just for the front. They technically WPULD still bost on, but you'd need custom sized rotors at 350mm (340+10). Brake bias would also be effected.

Anyway good luck op.
This is where you would be incorrect. You only need stock 335i/340i 340mm rotors with the 4 piston 340mm calipers (unpainted grey or M Sport Blue painted). The calipers will bolt on no issues at all and no brackets are required.
You seem to not understand I am talking about the 340mm calipers being bolted onto the F8x since the listing mentioned those chassis. Plus no mention of additional brackets in any of my posts. Reading comprehension.
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      09-29-2020, 11:31 PM   #51
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Hey folks, do you guys know if the F80 M3 calipers are the same as F82 M3?
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      09-30-2020, 11:46 AM   #52
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Quote:
Originally Posted by itsrichierich View Post
Hey folks, do you guys know if the F80 M3 calipers are the same as F82 M3?
Yes. the calipers for f80/f82 M cars are the same minus the ceramic option. The calipers I used are from an M4 for what its worth.
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      10-08-2020, 02:44 PM   #53
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Can I use my current silver caliper backing plates or do I need to swap them to the M performance setup?
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      10-17-2020, 03:37 AM   #54
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Quote:
Originally Posted by itsrichierich View Post
Can I use my current silver caliper backing plates or do I need to swap them to the M performance setup?
Look at the bottom row of images in this post. This is for a conversion from 312mm to 370mm. The part numbers for the new stuff are in an earlier post in the same thread.

https://f30.bimmerpost.com/forums/sh...4&postcount=23
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      10-17-2020, 09:46 AM   #55
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Quote:
Originally Posted by SD Convert View Post
Look at the bottom row of images in this post. This is for a conversion from 312mm to 370mm. The part numbers for the new stuff are in an earlier post in the same thread.

https://f30.bimmerpost.com/forums/sh...4&postcount=23
Looking at BMW DIY Guy video, he uses the stock backing plates from his silver brake setup (which I have) so I think Iíll be good.

Just waiting on rotors and Iíll be set!
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      10-17-2020, 10:59 AM   #56
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Quote:
Originally Posted by itsrichierich View Post
Quote:
Originally Posted by SD Convert View Post
Look at the bottom row of images in this post. This is for a conversion from 312mm to 370mm. The part numbers for the new stuff are in an earlier post in the same thread.

https://f30.bimmerpost.com/forums/sh...8;postcount=23
Looking at BMW DIY Guy video, he uses the stock backing plates from his silver brake setup (which I have) so I think I’ll be good.

Just waiting on rotors and I’ll be set!
He used the M Performance BBK which is different from the M compound brakes. The only difference is the rotor sizes.
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      10-17-2020, 07:21 PM   #57
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Quote:
Originally Posted by 435i_Phil View Post
He used the M Performance BBK which is different from the M compound brakes. The only difference is the rotor sizes.
I understand. But what I was asking is when switching to the M3/M4 brakes (same as M performance), can I use the backing plates from my silver brake setup or if I need to swap them out. Based on his video and part #, I should be fine and not need to swap the backing plates.
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      10-17-2020, 07:35 PM   #58
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I didn't change the backing plates. Just calipers and rotors
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      10-17-2020, 11:53 PM   #59
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Quote:
Originally Posted by itsrichierich View Post
Quote:
Originally Posted by 435i_Phil View Post
He used the M Performance BBK which is different from the M compound brakes. The only difference is the rotor sizes.
I understand. But what I was asking is when switching to the M3/M4 brakes (same as M performance), can I use the backing plates from my silver brake setup or if I need to swap them out. Based on his video and part #, I should be fine and not need to swap the backing plates.
328i would have a smaller backing plate. 335i has a big enough one.
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      10-19-2020, 03:40 AM   #60
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Depends. All iX have the big bearing aka big parking brake aka big backing plate.
So do ePost 07/2014 rwd.
It’s only the pre July 2014, small engine, rwd, non convertible ones you have to worry about.

If you check real OEM and have the small rear parking brake then you might need the larger Backing plate. If you don’t, then you don’t. Badabing babda boom .
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      11-30-2021, 02:21 PM   #61
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Bringing this back from the dead here .

Anyone know if the rear carriers/hubs from the F80/F82 M3/M4 will work on the F30/F31 chassis with the larger rear parking brakes already equipped?

Doing M5 front calipers w/ 400mm M2 Comp rotors, and would like to try and upgrade to the large M2/M3/M3 drilled 370mm rotors. I understand I can use the blue msport rear calipers as they are, since they are the same caliper as the m3/m4, just that the caliper mounting point on the carrier/hub is what allows you to run the larger rotor on the M2/M3/M4.

I'm just unsure if the control arms and axle size differ between an Xdrive f30/f31 and the m3/m4 which would be the initial concerns as far as fitment goes. If anyone else sees issues with fitment do to other items I'm not considering I'm all ears. It seems the rear carriers for M3/M4 are pretty inexpensive on ebay.
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