08-23-2020, 10:25 AM | #1 |
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BMW m340iX G21 upgrade to G3X M-performance brakes
Hi
Upgraded my front brake setup to the G3X M-performance calipers and 395mm rotors. This is a bolt on upgrade, you only need to modify the dust plate a bit with a screwdriver. Also upgraded the rear rotor to the dotted version. Front calipers partnumber: 34106880679 + 34106880680 Front rotor partnumber: 34106887657 + 34106887658 Rear rotor partnumber: 34206896227 + 34206896228 Big thanks to blau3er for supplying the calipers and pads! And yes, the car needs a wash |
08-23-2020, 10:30 AM | #2 |
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Awesome!
Looks great and I’m fairly certain that you are the first G2x owner to do the 395mm front upgrade from G30 G11 etc. So much better than the M Performance option! |
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08-29-2020, 01:57 PM | #5 |
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Looks great.
Almost did this myself using those calipers from the same seller but have decided to hang back for now & go 374mm as I want to keep the weight down. One question why is it only the rear disks have the slots?? |
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08-31-2020, 05:33 AM | #6 |
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Thanks!
I was considering the same thing, saving weight! - But again, it is a daily driver, and not at track weapon OEM discs, and it seams that I cannot get slotted front discs, or I was not able to find the correct partnumber. |
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01-02-2021, 06:43 PM | #8 | |
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Quote:
The ///M discs bolt on, but the retaining screws do not line up. If you want ///M discs, then you can fit X3M / X4M discs to your car with the 395mm caliper you have - however, again, the retaining screw doesn’t line up. |
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01-04-2021, 07:04 PM | #9 |
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or just get these:
https://g20.bimmerpost.com/forums/sh....php?t=1787733 |
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01-07-2021, 11:22 AM | #10 | |
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They are VERY protective of their brand / unique parts... |
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02-24-2021, 12:26 PM | #12 |
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Anybody tried to fit rear g30 370mm brakes?
I have opportunity to buy full set from 540i, it's a 374mm front and 370mm rear Front is no problem, but I'm wondering if rear also fits |
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06-28-2021, 09:04 AM | #14 |
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Very nice. Did you guys have to upgrade the brake booster and master cylinder as well? Heard pedal still feels mushy or the same if you don't.
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2023 AR M3 Competition M xDrive |
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07-25-2021, 09:03 AM | #15 |
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Did you find torque specs for the calipers? If you did where did you find the spec so I can find the number for my brakes. (Blue M brakes on the m340i)
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07-25-2021, 10:21 AM | #16 |
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Can someone confirm that you need 20inch wheels to run the 395mm setup ? I already have 374mm on my car and I don't see how bigger rotors could fit in the 19inch wheels..
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Fun/HPDE: 2023 M3 6MT Individual Malachite
Past:2023 M4 CSL, 2022 M4C Vert, 2020 M340i, 2018 M2, 2015 M235i, 2008 135i 550whp Daily: 2023 X5 45e Daily/Family: 2021 Atlas Cross Sport 3.6 |
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07-27-2021, 07:32 PM | #17 | |
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*edit* reply was for the rear set up of 370mm. Last edited by OM3RTA; 07-28-2021 at 04:42 AM.. Reason: Info correction. |
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11-17-2021, 03:15 PM | #18 |
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11-17-2021, 03:16 PM | #19 |
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No negative brakepedal feel, if any the brake pedal feel is even better, and with 4 people in the car the amount of pressure to stop does not change, I'm very happy with the setup.
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11-17-2021, 03:17 PM | #20 |
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08-26-2022, 07:19 PM | #21 |
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03-06-2023, 01:33 PM | #22 | |
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Wheels are these: https://www.litespeedracing.com/vs10 Front brakes are from 5 series, rear is stock but with dotted roters. |
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