Originally Posted by Z K
I really hope they are using a M3-specific caliper application as opposed to using a universal sized piston caliper with adapters to fit the M3. The brake proportioning will be way off.
The piston sizes for this thread's caliper are spot on!
IMO, on paper, this kit is great because it is very versatile. I hope early adopters will not have too many issues, and this should become one of the mainstay kits for the E9X M3.