[F10GUY]

Originally Posted by Unspec

It kind of sounds like the improvement came from new hardware rather than upgraded hardware. e.g. you would have seen the same result if you got new rubber brake lines, new 348mm rotors, etc. 348 rotors never had a problem triggering ABS.

I'm sure I would, however if I was able to gain slightly a bit more stopping power and aesthetically filling up the rotor to wheel gap, I'm game!

Here's what the 7series caliper and 374mm rotor looks like with Style 351m wheels.

[Unspec]

Originally Posted by F10GUY

I'm sure I would, however if I was able to gain slightly a bit more stopping power and aesthetically filling up the rotor to wheel gap, I'm game!

Here's what the 7series caliper and 374mm rotor looks like with Style 351m wheels.

Any spacers?

[F10GUY]

Originally Posted by Unspec

Any spacers?

I'm running a 12mm spacer upfront.

[Unspec]

Originally Posted by F10GUY

I'm running a 12mm spacer upfront.

Even with the 351's?

[F10GUY]

Originally Posted by Unspec

Even with the 351's?

It clears the caliper without spacers. It just looks more flush with them on.

[F10GUY]

Originally Posted by 550iFreak

I did the x5M front brake upgrade about 2 years ago and it works fantastic on my 550i. Night and day difference and it looks phenomenal on my 20inch wheels.

With that said, I wanted to upgrade the rears to accommodate the fronts. I reread this post and noticed a potential fit of using 370mm rotors from a F01 7 series and the 550i GT.

In order to use the rotors, the stock 550i caliper/carrier setup won’t accept it so I went ahead and bought a set of M5 rear calipers/carriers from a reputable European salvage yard. It had low miles from a 2014 M5 which is good since my rear calipers are 130k miles old. Still works flawlessly since I performed a professional flush the past couple of months.

Anyways, I do like to report and fully verify that the 370mm rotors WILL FIT with the M5/M6 carriers and the corresponding brake calipers(550i or the Ms) without modifications or extra brackets. Fully bolt on and go.

It also further fill the wheel up nicely

Now the pictures are as followed:

Parts acquired.
Dry fit
Old setup vs new setup
View of the car with new setup(dry fit)
View of the massive front brakes

It will be completed this weekend after I choose what color brakes and doing one of the major overhaul of the belt driven system including the engine driven water pump.

So to clarify, are you using rear M5 caliper carriers, rear 550i calipers, on 370mm rotors from the F01?

Or rear M5 calipers and rear M5 carriers with 370mm rotors from F01?

[550iFreak]

F01 370mm rear rotors
550i or M5/M6 calipers
M5/M6 carriers
550i or M5/6 brake pads

The 550i shares the same caliper as the M5/M6. The only sole difference between the two is the fact that M5/M6 painted the calipers blue. The 550i comes in black.

You can start with a 550i retrofit with their rotors, caliper, carriers and such which would be an upgrade from the 528 and 535s.

Since I have a 550i, I opted to go larger but not break the bank of going full M5 upgrade and use the F01 7 series rear rotors. 370mm is very large so it is a good upgrade and it is widely available.

The hardest and most expensive thing on this retrofit are the carriers. You MUST use M5/M6 carriers which would run you 3-500 each side.

eBay will be your friend or a German junkyard that they will sell you the caliper and carrier set. Call around, and you might get lucky.


I got mines for 300 bucks for everything.....the calipers, carriers, hoses, and even the epb modules.

Good luck

[F10GUY]

Originally Posted by 550iFreak

F01 370mm rear rotors
550i or M5/M6 calipers
M5/M6 carriers
550i or M5/6 brake pads

The 550i shares the same caliper as the M5/M6. The only sole difference between the two is the fact that M5/M6 painted the calipers blue. The 550i comes in black.

You can start with a 550i retrofit with their rotors, caliper, carriers and such which would be an upgrade from the 528 and 535s.

Since I have a 550i, I opted to go larger but not break the bank of going full M5 upgrade and use the F01 7 series rear rotors. 370mm is very large so it is a good upgrade and it is widely available.

The hardest and most expensive thing on this retrofit are the carriers. You MUST use M5/M6 carriers which would run you 3-500 each side.

eBay will be your friend or a German junkyard that they will sell you the caliper and carrier set. Call around, and you might get lucky.


I got mines for 300 bucks for everything.....the calipers, carriers, hoses, and even the epb modules.

Good luck

Hey thanks for the info. I do have the rear 550i calipers with the epb modules. Or would I need to buy the epb modules for the F01 or M5/6 ones?

[550iFreak]

The modules are identical.
If that’s the case, source yourself a set of M5/6 rear carriers.

F01 won’t have the modules because their caliper setup is different and does NOT use the caliper to function the parking brake. They use the inner drum from the rotor to utilize the parking brake.

Just get those awesome carriers and the rotors. Slap em on!

[slimjoey]

Has anyone tried out the G series *small* caliper (works with 348x36 rotors) on F10? I watched this video on YouTube where it's shown to be feasible, but have yet to pull the trigger:

The fitment in the video looks different from the pictures OP posted, so i'm hopeful that this might be a cost-effective upgrade solution.

[Unspec]

Originally Posted by slimjoey

Has anyone tried out the G series *small* caliper (works with 348x36 rotors) on F10? I watched this video on YouTube where it's shown to be feasible, but have yet to pull the trigger:

The fitment in the video looks different from the pictures OP posted, so i'm hopeful that this might be a cost-effective upgrade solution.

Already attempted here:
https://f10.5post.com/forums/showpos...&postcount=156

Spoke clearance is the main problem.

Edit: Huh. Maybe not. They have a photo on their facebook showing a F10 with 374 760 rotors and 374 calipers.



Edit: Contacted them and they said it should fit under 343M wheels. I've found a used 748 set off a 750i for ~400, will report back.

[slimjoey]

Originally Posted by Unspec

Already attempted here:
https://f10.5post.com/forums/showpos...&postcount=156

Spoke clearance is the main problem.

Edit: Huh. Maybe not. They have a photo on their facebook showing a F10 with 374 760 rotors and 374 calipers.



Edit: Contacted them and they said it should fit under 343M wheels. I've found a used 748 set off a 750i for ~400, will report back.

Sounds great! Keep us posted.

Did they mention if the 348s would fit the OEM 351M 19’ wheels? If not I can also reach out to them

[Unspec]

Originally Posted by slimjoey

Sounds great! Keep us posted.

Did they mention if the 348s would fit the OEM 351M 19’ wheels? If not I can also reach out to them

I did not ask, no. But given that 348's are the stock sizes for F10 535's, it'll clear diameter wise. Spoke clearance is the main problem and will really depend on the wheels

[Unspec]

They fit under 20" M5 343M wheels. Verified that 18" wheels won't fit. In theory 19" should fit in diameter clearance, since it was just barely not fitting on the 18's. Spoke clearance on a 19" comes down to wheel design and offset. For reference, in the pictures, these are 374 calipers on a 348x30 rotor. They'll actually fit, you'll just need to source smaller pads (or trim them as stated in the video), but I plan on getting 374x36 rotors. Realistically, stopping power won't change too much, I'm pretty much doing this exclusively because I despise the floating front caliper design. Screw that anti-rattle clip.

Gonna get them cleaned up and powder coated. Some misc parts needed as well, such as the 374 rotor shield (or just trim the 348 one, not sure yet lol), stainless steel brake lines, and 550i rear calipers/rotors/yaddayadda

[Unspec]

Anyone know if these pins are still good to use, or nah? They have some nicks and pitting, but no major damage outside pin 4's end being a bit chipped up.

[addy27]

Originally Posted by Unspec

The only thing I'd be worried about with the plastic is that it might squish when the bolt is torqued to spec, so it might throw it out ever so slightly. Though it will definitely depend on the plastic material.

So for those who do want to order a spacer instead of custom making one, there is an off the shelf part that will do.

CNH Washer 896-15012 OR Part#: 86625256 (newer part number)

https://www.minnpar.com/product.aspx...uctcode=550901

Specs that should work: 13.5MM ID X 28MM OD X 4MM THICK. (FLAT, Metal)

[///M-ini]

For the people that have upgraded their F10 with 4/6 piston calipers, how is the pedal feel? Just installed 4 piston calipers from a G series BMW, and I`m not so sure that I like how the pedal feels. Have not driven it more than a few miles, and I have not tried bleeding it with ISTA procedure. Just wanted to get some input before I go at it.

[Blue Angel]

The F10 brake pedal feels mushy even with the small stock brakes. Any increase in caliper piston area will likely (and logically) be accompanied by an equivalent increase in pedal travel.

Has anyone measured the piston sizes on all these different caliper options?

[Unspec]

Originally Posted by Blue Angel

The F10 brake pedal feels mushy even with the small stock brakes. Any increase in caliper piston area will likely (and logically) be accompanied by an equivalent increase in pedal travel.

Has anyone measured the piston sizes on all these different caliper options?

On the 374 G series caliper, it's 40 and 44mm, one on each size on each side of the 4 pot pistons. The pedal on the F10 is mushy, but it's probably made extra mushy by air bubbles, as you need to run the ISTA flush if you disconnect the calipers from the brake line.

[Blue Angel]

Agreed that introducing air will require bleeding. I'm just saying that even with the stock brakes and having not been disconnected, my 335 brake pedal feels more mushy than firm (I've bled them manually at the caliper). Even after bleeding I would expect a caliper upgrade with more piston area to feel worse than the stock brakes do, all else equal.

Not sure if the M5 has a higher displacement master cylinder or not, but the part number is different: 34336799903

The master for every other F10, including the 550: 34336796729

[paul223]

I see many owners want to improve braking performance yet they choose heavy wheels for their car. BMW OEM non forged wheels weight 28-35 lbs each. I was debating about brakes upgrade but I got forged wheels. Each corner it was 8-9 lbs lighter. Now the car feels lighter, more responsive, more smoother on road, better handling and BRAKING. Depending on personal budget with other mods forged wheels are better upgrade.

[///M-ini]

Bled the system again today. Used a rubber mallet to tap the calippers while bleeding with a machine, and some air bubbles got out. Long story short, brakes feel solid now.