I just got the agp wastegate installed last week on my srt from modern. I read other threads regarding wastegates but none hit my question so hopefully someone can help me. The part was installed professionally by a dodge dealership not done by myself. As i'm driving and hitting 5psi this loud hissing noise comes from the engine. It's so loud i can hear it over my radio even when the windows are closed. With the stock gate i used to feel an awesome pull at 3,000rpm but now it seems to loose that pull. I'm consistently hitting 11psi and the dealership seems to think its correct and should make that noise even though it sounds terrible. I have asked numerous people and no one seems to know anything about it. Can anyone please tell me if that loud hissing is normal with the new wastegate or should it be like the old gate. Any help would be appreciated.