i have a eg hatch with a turbo gsr and its been acting a little wierd...... when i race or floor it.. it all seems normal and pretty fast, but when i get to 5k rpms i feel a lack of power...the rpms still clim but not the right way, i hear the turbo spooling high but not picking up ... i just order a skunk2 mani and i was told the the butterflys in the stock manifold cause this problem

any help