Y pipe is made using the two forward pipes from circuit werks kit. About 1st forward 8" of each front pipe is cut off and a 1 into 2 collector welded on. In my case, 8" of 3" was welded on forward of the collector and of course 3" flange.
What I'm trying to say is there is no going back to gasser config unless you get 2 more forward pipes from circuit werks.
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