I purchased those and after looking at them and doing some research I sent them back.
The picture shows the FoMoCo stamping, however, they are not original sourced OEM FoMoCo remanufactured calipers, and therefore will not have that stamping. When you receive the O'Reilly boxes, they will have China printed on them. Additionally, the Chinese remanufactured Brembo knockoffs will have a 1" half crescent metal molded in the middle of the front caliper right above the painted Brembo insignia, arcing up to the top of the caliper. That's how you can tell the Chinese knockoffs from the real deal FoMoCo Brembo calipers.
The Chinese knockoffs seem to work fine though. Get some high quality Brembo decals, spray with some high temperature paint, and then clear coat....no one except you will no the difference.
I've included a picture of the caliper you'll receive from O'Reilly's. Next to it I've placed a picture, for comparison, of an "real deal" OEM FoMoCl Brembo from GLOCKer who posted picture in this thread.
2014 Mustang GT Coupe Premium. Options include: California Special package, comfort package, navigation, glass roof, shaker pro system, 3.73 ratio limited slip axle, GT front grill/fogs, MGW race spec shifter, BBK X-Pipe, Corsa GT500 Quad Sport axle-back, Ford Racing ProCal tune. "If I wanted insane HP, I would have purchased a 2014 Shelby GT500!"