A MATE OF MINE HAS AN OLD CELICA WITH A 1GGTE WITH 1XRB20DET TURBO AND ONE VG20 TURBO. ONE MOUNTED HIGH AT THE FRONT AND LOW AT THE BACK. BOTH RUN STANDARD BOOST (10PSI)AND WASTEGATES, WITH FULL 3" EXHAUST OFF EACH TURBO(TWIN), TWIN THROTTLE BODYS. GOES AS HARD AS ANOTHER IG CELICA RUNNING TO4B WITH EXTERNAL GATE AT 23PSI