528i head on 528e block possible??

i have a donor motor from a 528e and im curious to if i can put a less restrictive head say from a 528i on the block and maybe gain some power??is it possible??

I don't know about the 525, but the head swap you suggest is not possible between the 325e and 325i. The head volume is much smaller and the compression would be too high, plus there could be piston/valve interference.

528e is a timeing belt, 'i' is a chain.......