The procedure to update the firmware of the Intel Network adapters is embedded in the package.
Image versions in BootIMG.FLB:
Combo Image Version Name 1.430.0
Setup Option ROM v2.8.25
iSCSI Option ROM v2.8.25
FCoE Option ROM v1.8.05
Intel(R) Boot Agent FE v4.2.08
Intel(R) Boot Agent GE v1.5.40
Intel(R) Boot Agent XE v2.3.08
The update procedure is described in the pdf file "Ethernet_Intel_I350-X520_PreBoot_ReadMe".