My mustang has a/c and it was upgraded I guess to the new refridgerant((not sure), but I've noticed after hearing hisses that my A/C lines are condensating. Why would they do this? Is this normal? I wouldn't think so since it's dripping some on my headers on both sides. It condensates from basically the compressor to the little black tank at the passenger side fire wall. It works up a nice sweat. All in all the A/C still blows hella cold.