Finally found a rare "Batwing" air cleaner for my 57 Olds. It was rough, but I just finished restoring it. They only made this batwing for the 57 Oldsmobile with J-2 set (tripower)for a few months, just a hand full of J-2 cars received these batwings. Then they came out with the round dry element type, for the remander of 1957 production. Not too many of these batwing aircleaners left, since they did not make them too long. I added the pictures, you guys are rough!