HO v/s SO radiator differences.

[NIsaacs]

I just noticed by accident they are different. The HO is bigger.

SO # 68322491aa, HO # 68322492aa

SO size, 50.3 x 26.2 x 6.6 inches, 25.50 Pounds

HO size, 52.2 x 24.4 x 9.0 inches, 28.30 Pounds

Per Radiator Express...the inlet/outlet size seems backwards...I didn't check for intercooler size.

The SO number seems to be discontinued, so maybe the same one now.

SO core is:

Core Dimensions: 34 x 20 1/4 x 1 5/8
Thickness: 1 5/8
Rows: 1
Tank Construction: Plastic
Core Construction: Aluminum
Inlet Diameter: 2
Outlet Diameter: 2

HO core:

Core Dimensions: 39 3/8 x 20 1/4 x 1 5/8
Thickness: 1 5/8
Rows: 2
Tank Construction: Plastic
Core Construction: Aluminum
Inlet Diameter: 1 7/8
Outlet Diameter: 1 5/8

 

[bcbender]

I know my radiator hoses are printed "D2HO/DP5500" on them, don't ask me why I remember that, but I recall thinking "huh" to myself.

 

[AH64ID]

I know my radiator hoses are printed "D2HO/DP5500" on them, don't ask me why I remember that, but I recall thinking "huh" to myself.

I noticed this in my 2018, and the 2022 is the same.

The sizing seems wrong, as I don’t think my coolant hoses are that small.

This part from Sinister says it fits HO’s only.

https://www.dieselpowerproducts.com/p-sinister-diesel-radiator-pipe-19-20-ram-67l-cummins