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I wish I could post more pictures and a scale! The Gen 4 EGR cooler was discovered by accident on eBay, so the pictures come from that. At least...
The Gen 4 EGR cooler seems to have been made with a bigger cross section than the one on the Gen 3. So perhaps harder to clog? First picture is...
I don't know if this helps, but in the absence of any other replies:- When I was initially trying to get my Torque OBDII adaptor working (by...