Corsa Gsi Cams - springs Questions

[nikos_asus]

1.
I wanna replace my camshafts with a mild/road use profile (256* /9.5mm).
Will it work properly with the factory settings?
Am i gonna need larger injectors (from c20SEH)?
What kind of performance should i expect? low/mid/high range ( CE16se engine GSI )
What about emissions ?

2.
A previous owner had installed STEINMETZ springs
Front springs code 30352122
Rear springs code 30452124

Does anyone knows the specs of those springs?