Ok so here's the deal about two months ago i got a stage I APR chip installed on my car so it has quite a bit more power, but i am now wanting to upgrade the turbo to a KO4, I am going to get a new dv, exhaust, fpr, and some injectors, but i was wondering to get the most power out of the turbo would i have to tune my chip, where can i do that, it is justi payed 500 for the chip so i was hoping to stick with it, i want the PC-16 software so what do i do. oh and should i get a tip chip in let me know thanks again for your help!!!