So i just got an email from my friend mike at innovativetuning.com (which is an amazing tuner shop in western NY for subarus) and he told me that with my down pipe and my exhaust and cobb stage 2 tune on my car that i am pretty much maxing out the stock fuel system. and that before i put my headers on i should upgrade the fuel system. I didnt think that was necessary at this point but he is the expert. I emailed him back but havent heard yet so i thought i would ask here. do i need to upgrade just the injectors or the entire fuel delivery system (pump, lines, injectors etc) or is the stock one good enough?