I ended up with these after a USA EBC distributor mixed up part numbers between ST/RS/Escape rotors.

Distributor ended up making it alright, but now I've paid for these and don't need them.

They are new in the box never used. Authentic EBC rotors.
I set these next to a set of Ebay rotors and the quality is apparent. Slots are wider and machined better with a much smoother radius and finish. EBC claims these are made of some unique alloy.

These will fit 2014-2018 ST fine. If your 2013 ST is bone stock, you will need the larger caliper brackets (we can discuss if needed).

Shipping will be about $50 across 48 states. I know this from the return process...