the screamer pipe is the wastegate pipe, that unit is designed to work on a turbo with an internal wastegate but the screamer part works pretty much the same on either style gate..
whats the brass looking thing thats screwed into the o2 bung cap?
I already tried i have a pic with it next to it i will post in a few. A g20 guy said i could drill have tap for the 18mm o2 sensor since the rwd 02 sensor is a 14mm. By the way it looks though seems like it wont work because there wont be much material left.