Auto Meter 4381 - Manual (Page 3)

Port 1 – To turbo pressure source, shared with bottom port if the wastegate
Port 2 – To both wastegates
Port 3 – Sintered muffler
This set up is used when higher boost are desired over the previous external
Wastegate single port application
Port 1 – Sintered muffler
Port 2 – To both wastegates
Port 3 – To turbo pressure source
Single Turbo – External Wastegate, Dual Port
TWIN TURBO – INTERNAL WASTEGATES