Pressure Drop????

I just installed a Blitz Super Sound BOV, Injen Intake w/HKS Extension and I am getting great pressure drop at high RPM's. When I drive normally throughout and around town everything seems fine, but when I go to race and hit about 5500 RPM's in first gear, my car just seems to lose speed, and it continues to do this throughout every gear. Also, when I get into second and the turbo starts to kick it, it boosts very high and then at about 5000 RPM's in second the car starts that thingy again. Anyone have any ideas, I think I have tried everything but am unsure, please let me know.

Thanks,
Cory

First of all, did you do an intake pressure test, to make sure the welds on the BOV flange were air tight? Second we need numbers, and actuall terms not "boosts high" "lose speed" "pressure drop" and "thingy"

Yeah, what talon said. But I have a gut feeling this is going to turn out to be the usual T25 dropping off boost at 5500+ rpm.

Well unfortunately, I dont have any numbers or readings right now, I am waiting for the boost guage and controller. So I cant even attempt to give you numbers because I trully have no idea. But I do think that the second with the t-25 maxing out at 5500 rpms is the problem. Please tell me how I can fix this.

Thanks,
Cory