UPDATE:
I just got the rear rotors from ECS.....I was shocked to see the BMW logo stamped on them....yes, these are genuine factory rotors...I even took a rear wheel off to check the stamping on the hub...both have exactly the same stamping; same size, same type font, same BMW logo.....
factory rotors for 5 bucks each???
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'13 128i 6sp, '19 Cherokee Ltd 3.2, '17 Ducati SuperSport S Gone But Not Forgotten: 74 Z28, 77 Datsun 280Z (1st 5sp in US), 92 Nissan 300ZTT, 94 MB SL600 V12, 01 M Roadster, 66 Yamaha TwinJet 100, 70 Suzuki X6 Hustler Race: GP/FP Spitfire SCCA, Merlyn FF SCCA, Mazda RX7 IMSA GTU, Yamaha FZR 400 AMA.