I have a friend with an '03 GT that just put down 403rwhp with just a 9lb vortech sq trim, and the dyno guy said he would be looking at about 425 if he got his fuel pump to stop leaking pressure. His only other mods are longtubes, gears, CAI, suspension, and fuel pump for the blower. How is it that the 4.6's can make this kind of power with just 9psi and we would be looking at like ~325rwhp or so? When he got it he was talking about how he was looking for between 400 and 450hp cause the guy he bought it from on ebay had a dyno sheet boasting these #s, and all my friends were telling him he was gonna be really disappointed cause the guy obviously had other mods to put down that much on just 9psi. I'm just really confused how he gained that much power on low boost and no other mods to speak of.