[BIMMERGUY91]

I thought with as much conflicting information as there is on this forum I would clear a couple of things up.

The blue, yellow, orange and red calipers are all the same calipers manufactured by Brembo just painted different colors. The standard 335i front brakes (unpainted grey) come with 340mm blank front rotors and the mounting flanges are not long enough to accommodate the larger 370mm rotor as see in the attached photo. It is possible that this could be remedied with an adapter bracket (I am working on a solution). The blue $650 M Sport front brakes come with 370mm blank front rotors. The yellow/orange/red M Performance front brakes come with 370mm dimpled and slotted rotors.

So for budget sake if you have a 335i then just decided which color you like and paint or powder coat your calipers that color.

Now go to Rock Auto and purchase CENTRIC part # 12634142, 370mm dimpled and slotted front rotor, for $122.79 a piece. Now you have M Performance front brakes.

This part is only applicable for people who did not have Brembo 2 piston rear calipers and had the single piston Bosch rear calipers stock:

For the rear you will need the Brembo 2 piston rear calipers, which are all the same regardless of color, and 345 mm rear dimpled and slotted rotors.

The part numbers for the Brembo 2 piston rear calipers are 34216799461 for the left and 34216799462 for the right. They are $600 a piece new from Tischer BMW but can be had for 50-60% secondhand.

For the rear rotors go to Rock Auto and purchase CENTRIC part # 12634147, 345mm dimpled and slotted rear rotor, for $123.79 a piece.

Once you have upgraded your front and rear brakes you will want to code the car to the M Performance 370 F/ 345 R specs.

So now if you started with grey unpainted Brembo calipers in the front and Bosch single piston calipers in the rear and follow these steps you will have a complete M performance spec brake system for a MAXIMUM of $1700 but it can easily be achieved for under $1000.

[BIMMERGUY91]

Turner Motorsports also gives a very good breakdown of the 5 different brake setups used on the F30 here: https://www.turnermotorsport.com/t-b...ke-Differences

[roll_the_dice]

This doesn't work on older Gray M sport 4 pot brakes as the mounting point to the car for the brakes are different and can only use 340mm rotors. I think I read somewhere that the 2015 and newer 335 M sport brakes are the same as the M Performance front, but not 100% sure on that. Different mounting radius which allows for the larger rotor.

[BIMMERGUY91]

Originally Posted by roll_the_dice

This doesn't work on older Gray M sport 4 pot brakes as the mounting point to the car for the brakes are different and can only use 340mm rotors. I think I read somewhere that the 2015 and newer 335 M sport brakes are the same as the M Performance front, but not 100% sure on that. Different mounting radius which allows for the larger rotor.

You appear to be correct that mounting points are extended on the M Sport and M Performance calipers vs. the grey base calipers. I will update that information. I don't think the information regarding 2015+ is correct though as the same part number for the grey calipers is listed for a 2014 335i as a 2016 340i.

[BIMMERGUY91]

I am going to work on developing a bracket to adapt the standard grey 335i brembos to work with the 370mm rotors. They are literally the same caliper even with the same stampings but the mounting holes are extended on the painted calipers.

Another option is just painting your grey Brembo 335i calipers, installing slotted and dimpled 340mm rotors, installing the 2 piston Brembo rear calipers with 345mm dimpled and slotted rear rotors and coding to the M Performance brakes. It might look a little funny due to the rear rotor being 5mm larger than the front but the only advantage the 370mm front rotor has over the 340mm front rotor is added heat dissipation. The swept area of the pad and the stopping power are identical.

[Stoo]

Originally Posted by BIMMERGUY91

I am going to work on developing a bracket to adapt the standard grey 335i brembos to work with the 370mm rotors. They are literally the same caliper even with the same stampings but the mounting holes are extended on the painted calipers.

Another option is just painting your grey Brembo 335i calipers, installing slotted and dimpled 340mm rotors, installing the 2 piston Brembo rear calipers with 345mm dimpled and slotted rear rotors and coding to the M Performance brakes. It might look a little funny due to the rear rotor being 5mm larger than the front but the only advantage the 370mm front rotor has over the 340mm front rotor is added heat dissipation. The swept area of the pad and the stopping power are identical.

IMHO you can't develop a bracket to adapt as the caliper is radially mounted. The hub carrier will be different for the larger diameter disc.

Also, the 370mm disc will have more stopping force than the 340mm disc due to the fact that the disc is 15mm further away from the centre, creating a larger lever effect. Despite the fact that the pad is the same swept area.

Physics 101. x

[roll_the_dice]

Originally Posted by BIMMERGUY91

You appear to be correct that mounting points are extended on the M Sport and M Performance calipers vs. the grey base calipers. I will update that information. I don't think the information regarding 2015+ is correct though as the same part number for the grey calipers is listed for a 2014 335i as a 2016 340i.

This is where I found the info I was thinking...it is on the Turner Motor Sports web page under the heading "My car has grey calipers"

M Sport Brake Upgrade 2 (S2NH/S2NHA) (pads, calipers, rotors): Sometime during 2012-2013 production BMW changed the M Sport Brake option to include larger front and rear rotors, a different front caliper (still 4-piston Brembo), and 2-piston Brembo rear calipers. It was a $650 option but still called "M Sport S2NHA" and could be added to ANY trim package (even a base model). This kit was the same as the M Sport offered in Canada/Europe. The calipers should be blue with an ///M logo but there's a slim chance they could be grey/unfinished with no logo. The front pads were a similar aggressive Euro-spec pad as above. The rotors are blank but the dimpled/slotted rotors from the M Performance brake kits are a direct fit if you want to change their appearance.
Specs:
Front: Brembo 4-piston calipers, grey or blue; 370mm blank brake rotors
Rear: Brembo 2-piston calipers, grey or blue; 345mm blank brake rotors

My car came with standard single pot brakes, so I don't know the validity of the statement above. I don't "think" it is true, but someone with the M Sport S2NHA package would have to chime in.

I am upgrading now to M performance brakes and had bought some grey calipers used also before I found the M performance kit used...so that is how I was able to take the comparison picture. I also received 340 and 370mm rotors and both are big, but the 370's are huge and slotted/dimpled as the 340's are blank rotors.

[BIMMERGUY91]

Originally Posted by roll_the_dice

This is where I found the info I was thinking...it is on the Turner Motor Sports web page under the heading "My car has grey calipers"

M Sport Brake Upgrade 2 (S2NH/S2NHA) (pads, calipers, rotors): Sometime during 2012-2013 production BMW changed the M Sport Brake option to include larger front and rear rotors, a different front caliper (still 4-piston Brembo), and 2-piston Brembo rear calipers. It was a $650 option but still called "M Sport S2NHA" and could be added to ANY trim package (even a base model). This kit was the same as the M Sport offered in Canada/Europe. The calipers should be blue with an ///M logo but there's a slim chance they could be grey/unfinished with no logo. The front pads were a similar aggressive Euro-spec pad as above. The rotors are blank but the dimpled/slotted rotors from the M Performance brake kits are a direct fit if you want to change their appearance.
Specs:
Front: Brembo 4-piston calipers, grey or blue; 370mm blank brake rotors
Rear: Brembo 2-piston calipers, grey or blue; 345mm blank brake rotors

My car came with standard single pot brakes, so I don't know the validity of the statement above. I don't "think" it is true, but someone with the M Sport S2NHA package would have to chime in.

I am upgrading now to M performance brakes and had bought some grey calipers used also before I found the M performance kit used...so that is how I was able to take the comparison picture. I also received 340 and 370mm rotors and both are big, but the 370's are huge and slotted/dimpled as the 340's are blank rotors.

Can you confirm or deny that the difference in the 340mm and 370mm rotors in terms of dimensions is in the hat of the rotor? I have read that the 340mm rotor has the some rotor surface area as the 370mm rotor but the hat is larger on the 370mm.

[roll_the_dice]

Originally Posted by BIMMERGUY91

I am going to work on developing a bracket to adapt the standard grey 335i brembos to work with the 370mm rotors. They are literally the same caliper even with the same stampings but the mounting holes are extended on the painted calipers.

Another option is just painting your grey Brembo 335i calipers, installing slotted and dimpled 340mm rotors, installing the 2 piston Brembo rear calipers with 345mm dimpled and slotted rear rotors and coding to the M Performance brakes. It might look a little funny due to the rear rotor being 5mm larger than the front but the only advantage the 370mm front rotor has over the 340mm front rotor is added heat dissipation. The swept area of the pad and the stopping power are identical.

If you are going to develop a bracket, develop one that will work with other brembo brakes like Porsche Boxster brake calipers...a quick look on ebay and they are much less expensive, which would definitely be a BBK on a budget. I was thinking across the same lines, but got very little response to a post I did a few months ago. I talked to a few different companies and it can be done and has been done, just not consistently. Porsche Boxster 4 pot calipers can be had for under $250 most times for a pair. Since they mount with a post, it should be easier to create a bracket like what is used on most Brembo brakes...BMW chose to use static mounting points, probably to drive the sale of larger rotors and brakes.

[roll_the_dice]

Originally Posted by BIMMERGUY91

Can you confirm or deny that the difference in the 340mm and 370mm rotors in terms of dimensions is in the hat of the rotor? I have read that the 340mm rotor has the some rotor surface area as the 370mm rotor but the hat is larger on the 370mm.

I just checked and the hat on the 370 is larger than the 340. The 340 rotor hat will fit inside the hat on the 370mm rotor.

[BIMMERGUY91]

Originally Posted by Stoo

IMHO you can't develop a bracket to adapt as the caliper is radially mounted. The hub carrier will be different for the larger diameter disc.

Also, the 370mm disc will have more stopping force than the 340mm disc due to the fact that the disc is 15mm further away from the centre, creating a larger lever effect. Despite the fact that the pad is the same swept area.

Physics 101. x

Sorry, its early . You are correct the 370mm will have marginally more stopping force, somewhere in the neighborhood of 50 ft lbs, which can easily be accounted for by increasing the friction coefficient of the front pad.

As far as the calipers being radially mounted I'm pretty sure you are incorrect. The part of the caliper I circled in the pictures above are the lug mounts.

[BIMMERGUY91]

Originally Posted by roll_the_dice

If you are going to develop a bracket, develop one that will work with other brembo brakes like Porsche Boxster brake calipers...a quick look on ebay and they are much less expensive, which would definitely be a BBK on a budget. I was thinking across the same lines, but got very little response to a post I did a few months ago. I talked to a few different companies and it can be done and has been done, just not consistently. Porsche Boxster 4 pot calipers can be had for under $250 most times for a pair. Since they mount with a post, it should be easier to create a bracket like what is used on most Brembo brakes...BMW chose to use static mounting points, probably to drive the sale of larger rotors and brakes.

That not a bad idea if we can find some calipers that have the correct size pistons. I have a brake bias calculator that can take all of that into account. I'll look at my Cayman brakes and see if those specs might work. Its very easy to make a lug mount to radial mount adapter. In fact you could probably just use the adapters that the Brembo GT kit uses.

[Stoo]

Originally Posted by BIMMERGUY91

Sorry, its early . You are correct the 370mm will have marginally more stopping force, somewhere in the neighborhood of 50 ft lbs, which can easily be accounted for by increasing the friction coefficient of the front pad.

As far as the calipers being radially mounted I'm pretty sure you are incorrect. The part of the caliper I circled in the pictures above are the lug mounts.

Apologies, NOT radially mounted, meaning you cant simply fit a spacer and extended bolt to move the caliper out.

As its only 15mm, I think it'd be extremely difficult to achieve.

[BIMMERGUY91]

You may be right. I will have to look and see. Another option would be what roll_the_dice said and adapt a cheap OEM radial mount caliper to work like a Porsche caliper. ECS Tuning did something similar with the E9X

[BIMMERGUY91]

Ok just an update on the brake situation here. I am thinking that the complete front and rear budget solution is going to be the following:

Front: F30 370mm rotors, 03-06 Cayenne "18Z" Brembo 6 piston front calipers and pads.

Rear: F30 345 mm rotors, 03-06 Cayenne Brembo 4 piston rear calipers and pads.

This is going to give you better heat dissipation, more braking power, better brake modulation and not to mention it will look extremely badass all for right at $1000 using all new or remanufactured parts. No junkyard or used parts. Brake bias should be within a couple % of the stock bias. This is pretty similar to what some companies have done on the E9x chassis.

[Jadar]

Originally Posted by BIMMERGUY91

I am going to work on developing a bracket to adapt the standard grey 335i brembos to work with the 370mm rotors. They are literally the same caliper even with the same stampings but the mounting holes are extended on the painted calipers.

Another option is just painting your grey Brembo 335i calipers, installing slotted and dimpled 340mm rotors, installing the 2 piston Brembo rear calipers with 345mm dimpled and slotted rear rotors and coding to the M Performance brakes. It might look a little funny due to the rear rotor being 5mm larger than the front but the only advantage the 370mm front rotor has over the 340mm front rotor is added heat dissipation. The swept area of the pad and the stopping power are identical.

Its been donehttp://f30.bimmerpost.com/forums/sho....php?t=1273765

Does looking at M235i or M240i seem funny? Then you really probably have not noticed it as all M135i/235i/240i cars come with
front rotor size of 340mm and rear 345mm.

If you look at the rotors from the side they look the same diameter, 5mm from 10ft away will hardly be a difference to see it as an eye sore. It looks just fine imo. I purchased my rear yellow calipers (new) for $400 bucks + rear rotors and painted the front. Looks great I may powder coat them this year to a different color..

Here is how it looks from the profile with 2 different rim setups. The only thing I did different is I changed the M Performance logo to a single M letter in the front.

[BIMMERGUY91]

Wow gorgeous car. I didn't realize the M235/M240 came with 340mm front and 345mm rear. Where did you get your calipers for $400 new?

[Insane435]

This is exactly what I have been waiting for, an alternative to the m performance brakes. I need to decide between adding the 2 pot rears or going with the cayenne brakes.

Where can i get the 2 pot rears only at?

[BIMMERGUY91]

You can order them from BMW or just look for some on Ebay or the forums.

[Insane435]

Originally Posted by BIMMERGUY91

You can order them from BMW or just look for some on Ebay or the forums.

Do you know the part number? And just to be clear, this would be ordering just the rear portion of the m perf brakes??

[BIMMERGUY91]

The part numbers for the Brembo 2 piston rear calipers are 34216799461 for the left and 34216799462 for the right. They are $600 a piece new from Tischer BMW but can be had for 50-60% secondhand.

[BIMMERGUY91]

https://getbmwparts.com/parts/index....&siteid=214672

https://getbmwparts.com/parts/index....&siteid=214672