Oh and your exhaust is defaintly holding your power back in the upper rev range.

My first graph had basically the same boost curve are your first graph:





You can see u are making peak power quicker with the 2" (more low down torque), with about the same spoolup (cause i had a stagger 2.5" downpipe) but topend, you can see the car breaths alot better. At redline my car was making 7-8psi. At 4500rpm it was 10psi. tapered off cause of the turbosmart MBC.