Quote Originally Posted by GreggPDX View Post
Based on the picture, it's missing the third port on the drivers side. The challenge with "RS6 Fitment", is apparently some of the early production cars didn't have the afterrun-pump routed back to the radiator, so those cars would not need the third port. The fitment guides don't seem to differentiate between the early and late designs, so they say they fit the RS6, but most likely don't.

It would be interesting to try and verify if the early cars really were different, anyone with a low VIN care to check?
I think you will find the aftermarket ones will not have the third port for the after-run coolant pump. I looked at many pictures and none had it. You can search on my post. I went with a OEM one for about $1k - it was new - built in 2017.

Scott