I am getting ready to bolt on my 2.8 and currently run a 10% lower, and I am debating if I should remove the lower and run the 3" upper, or keep the lower and run the 3.25". Is boost about the same either way or does the 3.25 and 10% make a little more? If the latter combo makes a little mroe boost I would rather run that set up, but if they make the same amount, I would probably rather sell it to use the money for other mods.