I received the Flexalite 45321 heat exchanger today:
It is not installed yet, but I set it on the front of the engine covers so one can see the size for perspective.
The Flexalite came with some mounting trim but I will need to go to Lowe’s or Home Depot to get an NPT connector to hose fitting. I am thinking get a 90 degree 1/2″ NPT elbow then an NPT to hose connector after I get the connectors pointed backwards.
I am still conflicted on how to install this. Choices are either install the new HX in place of the existing OEM radiator single pass HX or install the new HX in addition to the existing OEM radiator single pass HX. The advantage of the first choice is then I am set to add another heat exchanger under the bumper later if needed. The advantage of the 2nd choice is that we get the benefit of both exchangers in series, albeit at the cost of more resistance to flow.
The people using a variant of this HX are either using it alone, or with another front mounted heat exchanger in series. No one is using it in series with the OEM HX.