Could this SPA DG211 gauge be used for EGT and oil pressure instead of boost pressure?
It would but the pressure reading will not be ideal for boost pressure.
SPA have advised that you would be better off with a DG213 and then purchase the EGT loom and thermo couple:
DTA-201-XEFL
DTP-202-E
They will then alter the software in the gauge for the EGT readings.
5th November 2018