2 Secondary Vacuum Diaphragms. These new gaskets fit Holley 2 barrel carbs for 1969/1972 440-6 & 340-6 with vacuum secondary. List 4144 , 4175, 4365, 4374 , 4375 , 4376 , 4382, 4383, 4669 , 4670 , 4671, 4672, 4789, 4790, 4791 , 4792 , 6105, 6106 , 6107, 6197 , 6198 , 6403 , 6404 , 6405, 6406.
