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I have a 4-1 header so I can not weld the two new O2 bungs in the same positions as the picture above because it will only read from cylinder 1 and cylinder 4 ,that both explode simultaniously and both O2 sensors will read the same, thats why I was thinking on 1st and 3rd, cause when the 1st is...

I have installed a 4-1 header that have the O2 bung at the end of the header ,so I can put an O2 in the first cilynder and other in the third cilynder? I dont understand the following ""my suggestion is to plug up the whole thats there, drill, tap, and die 2 in the sides of the runners.""

C8 | | | O2 | | | C16

Hello Guys: I have swap a b16a on my 1989 Integra, I have rewired all my ECU`s pins and everything work fine, but the problem is that I have changed the stock double O2 manifold for a single O2 header wich I put together both O2 wires and connect them to the single O2 but now when I try to put...