[techwhiz]

Originally Posted by saddart

Hi planning to get the M performance brake kit but was wondering whether the M3 18 inch rim Style 260 would fit the 370mm rotors and caliper. hopefully someone can chime in, cheers thanks!

I run Apex EC7 wheels 19x9 up front and 19x9.5 in the rear.
Some 18" wheels will fit but I don't know which ones.
With any 18" wheel, the barrel with be close to the caliper.
If the spoke shape is wrong they won't clear the caliper.

You will need to test fit.

[feuer]

Originally Posted by techwhiz

I run Apex EC7 wheels 19x9 up front and 19x9.5 in the rear.
Some 18" wheels will fit but I don't know which ones.
With any 18" wheel, the barrel with be close to the caliper.
If the spoke shape is wrong they won't clear the caliper.

You will need to test fit.

style260m is tight even with stock 335i brakes that are 345mm. the issue is with the barrel design. the step takes too much space. I be very surprised if the fit. to my knowledge no 18" wheel from the e9x platform clears the 370mm f30 brakes. but like you said he can test fit.

[saddart]

Just had a second look at those clearence, i think i will go wif the safest bet and get the m sport caliper mate up to my stock rotors :,(

[feuer]

Originally Posted by saddart

m sport caliper mate up to my stock rotors :,(

that will not work, msport uses 340mm and your stock are 345mm rotors. you will need f30 rotors as well for perfect fit

[R99]

Feuer...

I have a 325d E91 touring, and I could use some help.

I currently have the full 135i brake kit on my car (6 piston fronts w/ 338x26mm disc and 2 piston rears w/ 324x22mm disc) This is a direct bolt on, with no modification needed.

I am thinking I would like to remove the 6 piston fronts, and replace with the 4 piston caliper and 370mm disc (to fill my 19" alloys better, and I prefer the look) I will leave the E8x 135i rear brakes in place.

I know a guy here in the UK who has fitted the 4 pot / 370mm fronts to his car, and he told me that his brake pedal feels the same as stock.

My main concern is a soft brake pedal (it feels fine at present with the 6 piston fronts and 2 piston rears) but I don't want to be unhappy once the work is completed!

[feuer]

Originally Posted by R99

My main concern is a soft brake pedal (it feels fine at present with the 6 piston fronts and 2 piston rears) but I don't want to be unhappy once the work is completed!

The 6 piston front with 2 piston rear from 135i were designed for our cars so is expected to have good pedal.
When you upgrade front 4 piston and rear 2 piston from f30 the bais get thrown off as well as the pedal feel.
If you are going to replace just the front I will not anticipate soft pedal because the rear 135i are made to replace your stock caliper.
Additionally, the pedal feel will depend from the disc and pad choices.
Go ahead, proceed with the swap. You will be happy.

[R99]

Originally Posted by feuer

The 6 piston front with 2 piston rear from 135i were designed for our cars so is expected to have good pedal.
When you upgrade front 4 piston and rear 2 piston from f30 the bais get thrown off as well as the pedal feel.
If you are going to replace just the front I will not anticipate soft pedal because the rear 135i are made to replace your stock caliper.
Additionally, the pedal feel will depend from the disc and pad choices.
Go ahead, proceed with the swap. You will be happy.

Thanks for the feedback.

The other option I am considering is to remove the full 135i brake kit (6 piston / 2 piston) and replace with:

FRONT: F3x 4 piston caliper & 370mm discs
REAR: Stock single piston caliper with 336x22mm discs

That way, more of the front and rear wheels will be filled with more disc!

I would obviously send my stock rear calipers off for a full rebuild and powder coat to the same blue as the Brembo's. I'd also fit new pads / discs for the rear too.

Thoughts?

[feuer]

Originally Posted by R99

REAR: Stock single piston caliper with 336x22mm discs

What are you going to do about the parking brake?

[R99]

Originally Posted by feuer

What are you going to do about the parking brake?

Nothing, as thats the standard rear set up for my car (E91 325d) so the parking brake will work as normal. It also works as normal with the current 2 piston Brembo's and 324x22mm discs from the 135i.

I think the single piston / 336x22mm stock rears would probably give the larger 4 piston calipers the best chance of having a decent pedal feel?

Also, would it give better bias by going back to the larger rear set up?

[R99]

Also, should I order the front calipers (they will blue) I would need the paint code, so I could match my rears - does anyone have it?

[feuer]

Originally Posted by R99

Nothing, as thats the standard rear set up for my car (E91 325d) so the parking brake will work as normal. It also works as normal with the current 2 piston Brembo's and 324x22mm discs from the 135i.

I think the single piston / 336x22mm stock rears would probably give the larger 4 piston calipers the best chance of having a decent pedal feel?

Also, would it give better bias by going back to the larger rear set up?

If you have small brake shoes 165mm and those rotors are from 330i or 335i and use 180mm large brake shoes so your parking brake won't function.

You car is e91 so is possible to have large parking brake kit from factory.

Single with 336mm will yield same or similar pedal feel with 2 piston 324mm

You can alter the bias with different pads. Don't worry much.

[feuer]

Originally Posted by R99

Also, should I order the front calipers (they will blue) I would need the paint code, so I could match my rears - does anyone have it?

Not sure but think is interlagos blue metallic a30

[feuer]

Originally Posted by R99

Also, should I order the front calipers (they will blue) I would need the paint code, so I could match my rears - does anyone have it?

Or Monte Carlo B05

[R99]

Originally Posted by feuer

If you have small brake shoes 165mm and those rotors are from 330i or 335i and use 180mm large brake shoes so your parking brake won't function.

You car is e91 so is possible to have large parking brake kit from factory.

Single with 336mm will yield same or similar pedal feel with 2 piston 324mm

You can alter the bias with different pads. Don't worry much.

Not sure about the brake shoes - but the car uses 336x22mm brake discs on the rear as standard. The part number is: 34216855004

I didnt' have to change any brake shoes parts between these stock discs and the new discs for the 2 piston 135i Brembo's.

The other option is to leave the 135i rear Brembo's in place and have the new 4 piston caliper refinished in the same grey paint.

I quite like the idea of swapping back to a larger rear disc though.

[R99]

I caved in and bought a set of the 4 piston calipers that accept the 370mm disc. They're a delivery mileage set, so the pads are as new.

Has anyone used an aftermarket disc for these calipers, or is the general consensus just to fit the OEM M Performance 370 dimpled / slotted version?

Also, what about backing plates - do I need to order F3x specific?

Apologies if this has been covered, but did a quick skim and couldnt see anything?

[feuer]

Originally Posted by R99

Has anyone used an aftermarket disc for these calipers, or is the general consensus just to fit the OEM M Performance 370 dimpled / slotted version?
-They are relatively new so I don't know of anyone using aftermarket but they are available. Also, you have M Sport that are blank in 370mm at more affordable price.

Also, what about backing plates - do I need to order F3x specific?
-You can keep your existing dust shields but f30 offer better coooing.

Apologies if this has been covered, but did a quick skim and couldnt see anything?
-You will need updated e90 brake pads sensors with long L, older versions have short L shape and don't fit the F30 pads

Post some photos from your car and the brakes

[R99]

Originally Posted by feuer

Post some photos from your car and the brakes

I will, here is my car as it stands. The brakes will look so much better behind the BBS.



So, to further my understanding the BMW disc options are:

OEM Blank M Sport 370x30mm part no: 34106797606
Optional M Performance dimpled / slotted 370x30mm part no: 34106797603

Is that correct?

Do you happen to have the part no for the correct pad sensor? Also, how about the protection plates, as there are two parts listed?

[feuer]

Oh wow! Your car is beautiful.

Correct, M Sport are also 370mm. They use the M Sport for the appearance package and the brakes so is confusing.
M Sport 370mm:34106797606
Sensor:34356789440
Left shield:34116792237
Right shield:34116792238
First photo is from old style sensor that you don't want. Second fits.

[R99]

Thanks! I've got it looking pretty decent at the moment, just a few plans left!

As for the brakes my 135i calipers use those larger L sensor brackets, so I should be fine on that front! May need a smaller one when I put the stock rear back on!

Which disc would you suggest? I'm thinking plain fronts to match the rears?

[R99]

Just called my local dealer and the parts department are telling me that the plain faced disc is £50 more expensive per disc than the dimpled / slotted!!

How is that possible?!

[feuer]

Originally Posted by R99

Just called my local dealer and the parts department are telling me that the plain faced disc is £50 more expensive per disc than the dimpled / slotted!!

How is that possible?!

Probably because he is an idiot

M Performance: $729.90
http://www.turnermotorsport.com/p-20...3-f34-f36.aspx

M Sport: $493.96
http://www.turnermotorsport.com/p-61...ort-s2nha.aspx

[R99]

I thought so.... called another local dealer and they are defiantly £250 each and the M Performance are £198.

I'm gobsmacked!