I've recently installed the Tial HTZ 65mm turbos on my 2007 Porsche 997.1 Turbo Tiptronic and getting turbo lag off the line. It will only power brake up to 2.2K rpms.

Here's the list of upgrades: Please help!!!
Fabspeed Supersport X Pipe Muffler
Fabspeed Headers
EVOMS Intercoolers
Cobb Accessport
High Flow Turbo Inlet pipes
IPD Y Pipe
IPD Plenum
GT3 Throttle Body
EVOMS Underdrive pulley
EVOMS High Output Ignition Coils & spark plugs

 

VTG turbos or Xona 6564?