The difference is so small between K16 and K24?
So the billet are really the best choice!
What about power we can get with K16 billet?
I allready got an FVD program and straight pipes.
What would be the price to transfrom my stock K16 please?

 

on pump gas with just a tune? yes...

k16 billets with injectors and decent intercoolers on 93 octane about 530 rwhp peak but more TQ... and k24 spec I wheel same config about 560rwhp bit the curve and delivery is much better... spec II ands another 25whp...
add 100 octane and the k24 billets start to pull away... these are real figures not some marketing dyno numbers....
your tune will not work with billets on after market Wgs... you either retune or get them to retune for the set up... a minimum 5 bar is needed and it has to be tuned for it...
there is no magic here...
I just did a 6speed car that had your tune in it... after I fixed his emission issues due to the tune, I loaded mine and he never looked back