The line that connects the liquid fitting on the condenser and the orifice tube fitting on the evaporator. This line only works on rear wheel drive vehicles that have passenger side (right) condenser fittings.
PLEASE NOTE: There were several different versions of this line made from 1978-1988. This hose is meant to replace all of those lines and is not an exact reproduction. It is modeled after the Buick Grand National line, which should allow for the most engine compartment clearance, as it drops to the frame rail instead of laying on top of fenderwell.