I don't know if semi trucks radiators are the same used on RV and frankly I don't care, but when radiator on my vintage Prevost got too close to fan bolts on Mexican dirt road, I called Prevost dealer and the new radiator was $7000 before tax. That was few years ago, so not sure how much prices changed.
I was happy finding a shop that recored damn thing for $3000.
Good thing old radiators are all copper/brass and can be recored.
1 important number to compare beside the size is rows.
Count the rows in your old radiator and order the same, or higher number.
