What kind of heater hose should I be getting?
My first project is removing the heaters in the cabin. I have a RE so I can't just loop the line back around because I need my defrosters. The line that I exposed inside says that it is SAE 20R3 Class D2. Do I need to keep that consistent or can I get a hose that is 30R3?
The rest of the specs are all the same but I have no idea what the classifications mean.