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Interesting, makes sense it's after the cats since they make quite a lot of heat from their reaction. Technically both recover heat from the exhaust, just the EGR one is focused on cooling the exhaust gases going into the engine. I didn't realize there was 2 systems on them.
So I take it the EHRS always has coolant flow and exhaust flow and the extra heat once everything is warmed up is needed to be removed at the radiator then.
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