fast Ed
forum member
Can't say with any certainty but I would think anything that clears the Brembos would most likely clear the S550 calipers.
Not really ... as discussed in this thread, the hat is deeper on the S550 rotors, meaning the S550 calipers don't overhang as much as compared to when they are installed over S197 rotors. When I mocked this up last year and posted in the thread, the Steeda 18x9.5" I had which cleared the S197 Brembos needed a spacer to clear the S550 calipers. So the S550 calipers are actually bulkier and wider than the S197 Brembos.
cheers
Ed