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Racing brake makes a set - https://racingbrake.com/sup-crk-01/

Yep did see that. Glad he is selling them seperately now. I decided the cost to get a set of those over from Europe wasn't worth it for me, but its a good option to have.

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Signature Werks Brembo BBK for the A90 - $2900 $2600 If you are unfamiliar with this kit, it uses OEM GM Brembo calipers plus an OEM Tesla Brembo E-Brake caliper, custom mounts, and custom rotors to enable a full BBK on the A90 without losing the E-Brake. Front Specs: 6 Piston Brembo Calipers...

Install completed, took it out this morning to bed them in. Performance is fine but brake pedal feels like shit. Going to have to bring them to by buddies shop and have him ISTA bleed them. Sigh.

OK - X3M rotors fit for the rear. In case these look weird, its because theyre cheaper full cast repalcements, instead of the OEM floating aluminum hat ones. It was easier to spend another $200 on cheap ones than $600 for OEM when i wasnt sure if they would fit.

Precisely.

Im not super sure about the front, only because I wasnt researching it but yes, the G30 LCI uses a 370mm rear, even without the M-Performance pack. The X3M/X4M uses the same rotors dimensionally, but they are the aluminum hat version similar to the G8x. And yeah the caliper is used on a ton of...

370mm x 24mm M550i LCI rear rotor, G8x Caliper. The rear rotor on the M550 went from 345 to 370 when they did the LCI refresh. The X3M rotors should be here tomorrow.

Up for sale are my KW DDC Coilovers, these are a great option to keep EDC and have a dual mode coilover. Price is $2800 OBO. These are $4700 new. Located in Central Florida and would prefer a local sale but can ship if needed.

Got any pics of the adapters you made? In other news, a 1" spacer works but is WAY too sketchy, so a proper spacer would be needed to use G8x rotors: Also the G30 M550i LCI rotors work: Just waiting on the X3M rotors to arrive. If those fit, ill return the G30 rotors and just use those.

Did you CNC your own adapters?

Thank you. It looks like the x3M uses a 2 piece riveted rotor just like the M3, but with a different offset. Ive ordered an M550i rotor, an M performace rotor, and an X3M rotor. I WILL figure this out 🤣

Im not sure what site you guys are using to check these measurements, but can you check the x3m rear rotors? Im starting to think those are what I need.

Shit like this is never simple, and if youre the first person to do it, its even worse! Good news is fronts fit great. We will see how the new rear rotors fit when they arrive and if I can get the adapters so I can use the full M rotors laters. Edit - Since the 26.7mm difference is 1.05", I...

I spent a bunch of time trying to figure out what happened yesterday. It appears that the M rotors have a much lower "offset" and are much flatter, so the calipers sit closer to the wheel face. Non-M rotors sit back much further. For now Ive ordered some cheap 370x24 rotors for a G30 to test...

Well, apparently I screwed up. Picked up a used brake kit from a G80, got the adapters for the front. The rear calipers do not fit. Do I need a different caliper mount? Different rotors?

I hope you have these on FB marketplace cuz they would be gone already.