exhaust question/opinions
i am wondering how much the headers and some good exhaust is going to help me? will there be a huge increase or just the normal, what 20-30hp, increase?
also after i swaped in the 5.3 for a 6.0 my boost droped from 6.5psi down to 3psi, i will probably pully that boost back up to 6psi or so before i get to put the headers and exhaust on, any guess on how much the boost will go down?

