I don't know why, but I always have problems with these kind of situations.

Basically, I have an enemy that blows up when killed, and all I want to do, is to offset the initiated explosion's position on the Y axis by 2.

So I have this:

var position = transform.position;

Instantiate (explosion, position, transform.rotation);

And what I want is basically: transform.position.y + 2;

Thanks