I just purchased myself a 2002 mustang gt convertible 5-speed and I have a coolant leak and I have no idea on what the line is called and where to find a replacement. I am 19 and new to the mustang world. I grew up around Chevys. If anyone could tell me what to purchase to fix the problem it’ll be much appreciated. The pic is the line that’s leaking. It’s the bigger line leading into the firewall.

 

I think it is a heater hose since it most likely is leading to the heater core.

 

Thanks. That’s the part