Pre Firecrest 404's and 11 speed

Does anybody know if pre firecrest Zipp 404's are 11 speed (Shimano) compatible ?
Cervelo S5 VWD DA Di2
Cervelo P5 Six RED
Cervelo R5 Record 11
Dolan Preffisio Winter Trainer
Scott Plasma Ltd SRAM Red
Scott Foil Premium Di2
S-Works Venge Di2
Giant TCR Adv SL Di2
Ribble Gran Fondo built for our 10 month winter
Cervelo P5 Six RED
Cervelo R5 Record 11
Dolan Preffisio Winter Trainer
Scott Plasma Ltd SRAM Red
Scott Foil Premium Di2
S-Works Venge Di2
Giant TCR Adv SL Di2
Ribble Gran Fondo built for our 10 month winter
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