Would like some advise and pics of where guys have installed the O2 sensors on a wet exhaust
I have IMCO Powerflow manifolds with SS risers to a short PC rubber hose to thru transom stub pipes

Thanks Bill

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You can see here wherei put mine.

thanks Ramos45, Is there anyone else how has some pics of the locations for O2 's in Manifold exhaust systems?

When I needed a wideband do my fuel map, I used a stock big block Mercruiser exhaust manifold and riser and purchased an adapter plate to sandwich it between the two.