Retune after upgraded cam?
 

So I needed to replace my cylinderhead on my turbocharged 2000 nb and bought a new cylinderhead.

But this cylinderhead contains the "upgraded" bp5a intake cam.

So my question is, do I need to retune my engine? Or am I just imagining things and won't I even feel a diffence, because I haven't installed it yet.

Thank you for your time :)