I currently have an invidia exhaust, dc sport header and aem v2 intake on my 01 s2000. I am getting my VAFC tuned at xs- engineering on tuesday, how much power do you think I'll have at my rear wheels??

 

Are you asking how much you'll have total, or how much you'll gain by tuning the VAFC? Just from VAFC tuning, I'd say that you might get an additional 2-4 peak hp, but you could pick up as much as 15-20hp near redline, depending on how rich you are running there currently.