[feuer]

Originally Posted by Mihai.M

Yup, tried ebay, but it's mostly sellers from the US. Seems to me that Europe is too split-up still - each country has their own advertising platform and 'breakers' would rather use those (or none at all, as is the case in my country - even if you call them, they're like "Well, come over and we'll take a look, see what's in the back").
Recently found something in one of the EU Northern countries, waiting for a reply from them to see if they're willing to ship it over.

If price deference is great order one from US. I'm sure you can find someone from your area coming home to RO this summer that can bring it.

[BlueM3Wagon]

FYI, reached out to cquence and they measured some e60 rotors they actually had on hand at a little shy of 63mm height. They can match dimple and slot pattern like the OEM rotors but their dimpling process goes deeper and not as rounded. Not sure what I'm going to do about rears still I'd hate to shave the calipers just to get them to fit the wrong rotors.

[mrnuke]

Originally Posted by Michaellcoates

FYI, reached out to cquence and they measured some e60 rotors they actually had on hand at a little shy of 63mm height. They can match dimple and slot pattern like the OEM rotors but their dimpling process goes deeper and not as rounded. Not sure what I'm going to do about rears still I'd hate to shave the calipers just to get them to fit the wrong rotors.

You could always go to a junkyard and scrap another set of rear knuckles and modify those instead of the calipers, so if you end up selling the car or upgrading brakes to something different, you can throw the stock ones back on.

[BlueM3Wagon]

Originally Posted by Seattlesquash

Inbox empty! Thanks for heads-up!

Here are ones I put in... works great and I think I ordered them for 535 (345) and Zimmerman's.

What was the manufacturer number on these rotors? And you said you had to mill 1-2mm off caliper?

[Seattlesquash]

Originally Posted by Michaellcoates

What was the manufacturer number on these rotors? And you said you had to mill 1-2mm off caliper?

On the fly reply, but this is what the eBay link look like for mine... hope this helps.

[Mihai.M]

Originally Posted by feuer

If price deference is great order one from US. I'm sure you can find someone from your area coming home to RO this summer that can bring it.

Thank you for the suggestion! But nope, no close friends matching that description and I'm not desperate enough (yet) to ask 'acquaintances' for favors

In the meantime, as I'm chatting with cypis about the bushings, sounds like he'll help me get the MC from Poland!

Unfortunately I seem to be somewhat stuck with the front calipers :/ The guy that has a nice set for sale is not answering my PM anymore. So back to searching (as mentioned, would like to find the gray version as I'll have them painted a custom color anyway).

On the topic of rear discs: I was looking at 150.3461.54 / 55 from Zimmerman.

[Seattlesquash]

Originally Posted by Michaellcoates

What was the manufacturer number on these rotors? And you said you had to mill 1-2mm off caliper?

Not sure on part #, as boxes are gone and installed. Sure they have it if you reach out to the seller. On the material, yes 1-2 mm and not very much as you can see here and perfect fit at this reduction in thickness. Also, remember to paint/cover upon completion.

[Aus335iguy]

Curious as to why the need for paint ?
It's aluminium and so isn't going to rust. The bushings maybe but they'd be jammed against the knuckle on the car... meh

[feuer]

Originally Posted by Aus335iguy

Curious as to why the need for paint ?
It's aluminium and so isn't going to rust. The bushings maybe but they'd be jammed against the knuckle on the car... meh

To prevent oxidation.

[BlueM3Wagon]

Might be a dumb question. I got my front Zimmerman dimpled and slotted rotors in today and realized the slots go up the same direction on both rotors? I assume the performance rotors are unidirectional. I'm ordering dimpled and slotted rears from R1 l, do I need to order 2 left rear rotors if I want them to match the fronts?

[gurusan]

Originally Posted by feuer

To prevent oxidation.

FYI, aluminum oxidizes nearly instantaneously.

[Aus335iguy]

Originally Posted by gurusan

FYI, aluminum oxidizes nearly instantaneously.

Never known it to do that. I do live in a dry climate(relatively speaking)

[gurusan]

Originally Posted by Aus335iguy

Never known it to do that. I do live in a dry climate(relatively speaking)

it's why you can't use any old welder on aluminum, it has to be void of oxygen.

Aluminum oxide is what you want, that's what makes it corrosion resistant.

[Seattlesquash]

Originally Posted by gurusan

it's why you can't use any old welder on aluminum, it has to be void of oxygen.

Aluminum oxide is what you want, that's what makes it corrosion resistant.

I also painted it so that I can sleep at night, knowing how well I finished off and painted the back of the caliper at its point of connection!

[Aus335iguy]

There are lots of unpainted, untreated aluminium surfaces on a car and i dont see aluminium oxidising readily. It does happen but i dont see it as a massive issue. Particularly where it wont be seen on the mating surface of a brake caliper. Thanks for informing me though. Learn something every day as they say

[Emilime75]

The difference with those bare aluminum parts and the calipers in question is that the calipers are painted/powder coated, and when the corrosion starts, it spreads, and then the finish begins to fail and bubble/peel.

Besides, why is this such a matter of contention here? Why do we care?

[Seattlesquash]

Originally Posted by Emilime75

The difference with those bare aluminum parts and the calipers in question is that the calipers are painted/powder coated, and when the corrosion starts, it spreads, and then the finish begins to fail and bubble/peel.

Besides, why is this such a matter of contention here? Why do we care?

May have been a slight dose of sarcasm from this side, but figured it would not do anything bad. However, to be back on topic - love these brakes, and especially for such a low $ cost/deal!

[BlueM3Wagon]

Originally Posted by Michaellcoates

Might be a dumb question. I got my front Zimmerman dimpled and slotted rotors in today and realized the slots go up the same direction on both rotors? I assume the performance rotors are unidirectional. I'm ordering dimpled and slotted rears from R1 l, do I need to order 2 left rear rotors if I want them to match the fronts?

Just ordered 2 lefts rear dimpled and slotted rotors 🤦. I hate that the fronts aren't directional but think it would look weird if the right side front and rear didn't match.

[gurusan]

Originally Posted by Aus335iguy

There are lots of unpainted, untreated aluminium surfaces on a car and i dont see aluminium oxidising readily. It does happen but i dont see it as a massive issue. Particularly where it wont be seen on the mating surface of a brake caliper. Thanks for informing me though. Learn something every day as they say

I still don't think you are quite grasping it all. any aluminum you see is already oxidized and resistant to any further corrosion.

[Aus335iguy]

Originally Posted by gurusan

I still don't think you are quite grasping it all. any aluminum you see is already oxidized and resistant to any further corrosion.

Thanks.

[ki_soarer]

Originally Posted by Michaellcoates

Just ordered 2 lefts rear dimpled and slotted rotors 🤦. I hate that the fronts aren't directional but think it would look weird if the right side front and rear didn't match.

It is odd, but the factory bmw performance rotors are not directional. I never noticed until I looked at the rotors sitting on the floor and saw they cuts went the same way on both sides. I suppose it doesn't matter as no one will be looking at the driver and passenger sides at the same time unless something terrible happens.

[BlueM3Wagon]

Originally Posted by ki_soarer

It is odd, but the factory bmw performance rotors are not directional. I never noticed until I looked at the rotors sitting on the floor and saw they cuts went the same way on both sides. I suppose it doesn't matter as no one will be looking at the driver and passenger sides at the same time unless something terrible happens.

Right, won't be noticeable as far as direction goes, just as long as the sides match. Note to anymore cutting rear e60 rotors to match M Performance ones!

The other thing I was thinking about, maybe this is me over thinking. The dimples and slots have coating on them, I'm getting the rotors dimpled after the coating is done. Wondering if I should somehow spray the slots and dimples with a silver rotor paint to protect them or will it not matter? Would hate for them to rust or not match.