Would I see any improvements if I flush out my intercooler on my fabia vrs? Is it easy to do?

Depends how many miles it's done. Is it the standard one?

It'll be a bumper off jobbie, and to be honest you're only going to find a bit of oil in there, not a lot else. It's not really worth the hassle unless you're taking it off for something else

You dont have to take bumper off just the under engine tray. Theres a guide on fabia-vrs.com

Any Benifits from doin it?

If its gunged up then it can decrease performance a fair bit. Needs as much surface area as possible to cool the air so if some of surface is covered it wont work as well.

Did mine last year only bit of oil came out. But done alot of miles this year and noticed gunk in pipe on top bend after vnt so ill be cleaning all lot out when i get chance.