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)