For the Ford Power Stroke Diesel 6.0L,
The EGR Cooler provides the important cooling before the (EPA required) return exhaust
reintroduction. You can see its operation this animation of our EGR Cooler Upgrade design.
We have replaced the more fragile multiple flat and thin exhaust channels with a set of 6 heavey-duty tubes.
You can see this is not a place you want to be leaking coolant from a failed EGR Cooler, or making this replacement repair again and again with the stock part.