These remote radiator filler caps are perfect for water to air intercooler applications or other custom radiator installations.
Simple in design, the 3/4" barbed fittings are removable in case you need to install your own fittings in the 1/2" NPT Female threads.
The overflow tank nozzle is also removable in case you do not need an overflow tank. For water to air intercooler applications, it is common to just leave it open since your system should not exceed the cap pressure.
As shown in the picture, the pressure rating on the cap is 0.9 bar (13 PSI).