ok i may be shooting way off pitch here but if i were to force induction on a standard ej20 what would i need to change, i know about internals its the actual change of induction, do i swap the mani over and replace with atrubo mani to incorporate the turbo and wastegate?? then there is the intercooler etc.

if anyone can shed light it would be helpful and this is hypothetical so lets not go down the funding route

 

Worth having a look on Nasioc as quite a few of them turbo/supercharge the N/A Imprezas they have over there.

 

If you look at the spec of a turbo, that is what you need,
funding route, it would be cost effective to by a subaru with a blower bud,
i don't think it would be cost effective to change a NA to a FI

Bez