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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > M3 brakes conversion question



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      01-24-2012, 02:22 AM   #1
rayguy24
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M3 brakes conversion question

I've searched this topic, but have not come up with a definitive answer.

Does anyone know if M3 brakes (calipers, rotors, pads, the whole assembly) would fit an e90 328i? I know for sure it wouldn't fit with the stock 16", but I have 19" wheels (19x9 et36 +5mm spacer fronts and 19x10 et38 +12mm spacer rears) which should clear a BBK.

Thanks for you help!
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      01-24-2012, 01:12 PM   #2
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Quote:
Originally Posted by rayguy24 View Post
I've searched this topic, but have not come up with a definitive answer.

Does anyone know if M3 brakes (calipers, rotors, pads, the whole assembly) would fit an e90 328i? I know for sure it wouldn't fit with the stock 16", but I have 19" wheels (19x9 et36 +5mm spacer fronts and 19x10 et38 +12mm spacer rears) which should clear a BBK.

Thanks for you help!
Not sure but I think aftermarket rotors are what your looking for. Our OEM calipers are fine and with fluid, lines, pads upgrade along with rotors you can improve their performance by a lot.

Also, there may be an issue with the hub and the M3 rotor. Just think I remember hearing that but can't be sure.
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      01-24-2012, 01:24 PM   #3
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Why not consider the yellow BMW Performance brakes?? Which I could get them for my 335 :-(
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      01-24-2012, 01:32 PM   #4
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They do not fit. 335 conversion is the only direct OEM swap.
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      01-24-2012, 01:34 PM   #5
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I think more R&D time needs to go into this idea (the yellow brakes are for the 135i and smaller than ours correct? )
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      01-24-2012, 07:01 PM   #6
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So Fluid MotorUnion did it : http://www.modifiedcartrader.com/for...9-BMW-335-335i


But how?

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      01-24-2012, 07:32 PM   #7
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Quote:
Originally Posted by Hooy View Post
They do not fit. 335 conversion is the only direct OEM swap.
By "335 Conversion" do you mean that 328i brakes can only be swapped with 335i brakes?

-or-

only 335i brakes can be swapped with m3 brakes?
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      01-24-2012, 07:46 PM   #8
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Quote:
Originally Posted by rayguy24 View Post
By "335 Conversion" do you mean that 328i brakes can only be swapped with 335i brakes?

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only 335i brakes can be swapped with m3 brakes?
If you have a 328 you can use 335i brakes
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      01-24-2012, 08:15 PM   #9
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Jason: We fabricated a bracket for the front, and did a whole slew of welding/machining for the rears. We have a bracket ready to sell for the front, but brake bias will be affected without doing something in the rear. Most garages probably won't do the mods required for the rear.
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      01-24-2012, 08:39 PM   #10
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I can sell you a 335 set up... then I can buy my BBK.
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      01-25-2012, 11:37 PM   #11
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Quote:
Originally Posted by JDLM View Post
Jason: We fabricated a bracket for the front, and did a whole slew of welding/machining for the rears. We have a bracket ready to sell for the front, but brake bias will be affected without doing something in the rear. Most garages probably won't do the mods required for the rear.
Thanks for messaging, at least now we have an answer.

Too bad it's not a simple bracket adapter for the rear; I'm sure we'd have them on the market by now if it was that simple.

OP, If you decide to go 335 (which I recommend, they're more powerful than 135 or performance), you'll need the 335 e-brake assembly for the rear as your current one won't work with the larger rear rotors.
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      01-25-2012, 11:38 PM   #12
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Quote:
Originally Posted by yakev724 View Post
Thanks for messaging, at least now we have an answer.

Too bad it's not a simple bracket adapter for the rear; I'm sure we'd have them on the market by now if it was that simple.

OP, If you decide to go 335 (which I recommend, they're more powerful than 135 or performance), you'll need the 335 e-brake assembly for the rear as your current one won't work with the larger rear rotors.
Yeah I saw them on FB (they said they were going to re-dyno the car) I asked for pics of the bracket.

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      01-31-2012, 05:22 PM   #13
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Quote:
Originally Posted by yakev724 View Post
Thanks for messaging, at least now we have an answer.

Too bad it's not a simple bracket adapter for the rear; I'm sure we'd have them on the market by now if it was that simple.

OP, If you decide to go 335 (which I recommend, they're more powerful than 135 or performance), you'll need the 335 e-brake assembly for the rear as your current one won't work with the larger rear rotors.
So in converting to the 335 e-brake assembly, does also require 335 hub carriers, bushings and bearings? That's some expensive cheddar just for an e-brake.
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      01-31-2012, 11:09 PM   #14
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Quote:
Originally Posted by rayguy24 View Post
So in converting to the 335 e-brake assembly, does also require 335 hub carriers, bushings and bearings? That's some expensive cheddar just for an e-brake.
Or you can do what this guy did:

http://www.e90post.com/forums/showthread.php?t=604481

We are talking about a parking brake after all, so this should be plenty unless you plan on some serious rally type driving or parking lot hooliganism.
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