These Fittings are designed to fit various Fuel Injection Filters for GM cars to convert to -6 AN or 3/8" female inverted.
P/N 5100 -6 AN male blue (AC 481)
P/N 5100-C -6 AN male clear (AC 481)
P/N 5105 3/8 fem.X 3/8 fem. inverted (AC481)
P/N 5115 -6 AN male X 3/8 fem. inverted (AC 481)