Either way, the hp and tq increases are awesome. Looking at my dyno graph, I notice that it made peak hp at just over 10 psi @ 5050 rpm's, and then misfired, but at just over 5100 rpm's it was making 11 psi. I heard that the benefit of the power pipe isn't really seen until 10 psi and can increase boost by 4 psi. Shouldn't the 5.0 stop making power somewhere around 5700 rpm's? If that is true, might I not see around 14 psi at red line? If it made 380 hp at 10 psi at about 5050 rpm's, and it is making around 16 hp per 1 psi boost, I think it is safe to say it would easily be over 400 rwhp before it stopped making power at higher rpm's...