i have 42# injectors now and my tunner told me they are maxing out,i have the 03 tank and pumps now.what size injectors do i need and do i need focus pumps? i dont want to use a boost a pump. i am putting 478rwhp/445rwtq, i am adding a p51 intake,5-7 more psi and 1000 more rpm(6900) with this i am hoping 550rwhp/500rwtq