Has anyone tried this? F56 JCW calipers look very similar to R56 Calipers but part numbers are different, good deal on a set here locally, If mounts are the same might give them a try.

 

here is a picture of the brakes for sale

 

Getting the calipers mounted might be the easy part. Getting rotors to match will be the harder part. Bolt pattern is different, and offset looks off, too.

If you want a bolt on kit, this ain’t it.

 

I would get some 4 pot JCW calipers from a R55-R59, much easier and the braking will improve as much as these. Sell them to a F55-F57 guy and make some profit, they will take them in a heartbeat. Lots of work to make them work.

 

This. This will be a raging headache to retrofit. Assuming you somehow get the caliper to fit, fitting the newer MUCH larger rotor will be a giant pain.