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- #81
not a direct question about the flange. I will be replacing the downpipes piece. the "branch" pipe that comes off the downpipe hooks to the brass contraption under the hood. Do I need that brass contraption if I am not running an air pump?Not sure what you're asking here, but if you're referring to the thing with the three-holes in it, that's an upgraded replacement Stainless Steel flange for the one that's welded to the top of the downpipe, that bolts to the underside of the exhaust manifold.
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