My current turbos are 700 BB. i have the Selin, 740 injectors.. and a few other toys. I already have 3 inch down pipes to 2 1/2 inch test pipes and I just realized that I would need to revert back stock ones if I remain with stock turbos. :(. But I love the horsepower and torque curve of the stock turbos. Because I am used to all that lag with the 700s. If I stay with stock turbos do i have to remove one of my air filters replace my 3 inch down pipes and what else what I have to do?