Compressor hose assembly is for all 1977-late 78 Firebird, Formula, Sprint & Trans-AM. This is the hose assembly that bolts to the back of the of the compressor, connecting it to the accumulator at the firewall and the top fitting of the condenser in front of the radiator support. American made of all new components, including barrier hose that is compatible with both R12 & 134a refrigerants. NOTE - 1978 models used two versions of this hose. This version with the remote muffler was typically used through late 1978. Both hoses interchange without modification. See our other listings for that hose.