If the Polestar 2 has the same rotor size then I don’t see why not.

 

Since it's from a different platform, I think that you will need at least an adapter.

I think the better and cheaper option will be to get the 4-pot Brembos from an Alfa Romeo, buy or make an adapter for the calipers, and use it with the original 336mm Volvo brake disc.

Check out the Czech VolvoClub forum to see how it looks on the S80.

 

Those Alfa brembos would work if I cleaned them up and had them painted! I can not read the form though lol. And I am thinking he was only able to fit them to the front since the back brakes use an electronic parking brake back there that would not work I would guess. I would think a light would go on the dash or a message stating electronic parking brake does not work if they were set up for use on the rear. Wish someone sold a kit or could guide me through this. They look identical in size and shape to the old 04 to 07 R Brembo brakes. Was told would need a S80 knuckle and some parts in the past to make them work.

 

Yes, only the front. Never talked about rear calipers. The R and Alfa calipers may look the same, but they slightly differ (mounting, etc.). Polestar S60/V60 models use the same rear brake setup as the T6 ones, except they have different, more aggressive pads. If you want larger rear brakes with 4-piston calipers and functional parking e-brake, then your only choice is the Rotora kit.

 

Any idea if ALL Alfa Calipers 4 piston are direct bolt on then for the front? I know you said buy an adapter just know idea what I need.

And also wonder if all Alfa 4 piston are all the same, can get a cheap set on of Alfa 4 piston on eBay now.

I did email the guy from link you sent but not sure if he will respond.

Rear is fine I can always have the stock sanded down and painted, saw that done and they came out nice.

 

It should be calipers from the Alfa 159/Brera/Spider 939. With an appropriate adapter, it should be a bolt-on. Maybe, depending on your wheel, you will need a spacer if your wheels won't clear the calipers.

 

Thanks for input, Problem is finding: An adapter that would work. I just wonder where