I just bought on 06, 6.0, and I want to keep it mainly stock until I have the cash to do the egr, studs, oil cooler, etc. I just bought the cat delete and muff delete pipes and are going to install soon. I want to do an air intake,but only if it is worth it without tuner mods. I am thinking the AFE stage 2. Is it worth spending the cash, or waiting until I do the necessary engine mods? Plus will an intake put my head studs in jeopardy? Your opinion is appreciated. Thanks.