ALEEXX

i have an a4 2002 awd. I know from you guys and other forums that my ko4 turbo should just bolt in , straight fitment . Now my question is , since i have the ko3 on b6 2002 and want to upgrade to ko4 , if i put the ko4 without tune it, exhaust, been doing a little of research and found out that i dont necessarily need larger injectors but im not sure. Would i be expecting engine codes? Missfires? Some weird stuff? If you put the ko4 as a replacement?... Of course i will get a proper tune, exhaust etcc ONCE i get the money, but for now what are the chances that something goes wrong? Or maybe should i just wait once i have everything?

lyleswk

Yes, but not sure the point. My understanding is there is little to no performance benefit without larger injectors and tuning.