Description This Female -12 High Flow Billet Y Fitting is a universal part. -12 ORB inside can be utilized with any Magnus Black Anodized -12 ORB fittings to make any combination of outlets, from -10 to -16 �� ” Just got the Y block, it’s a beautiful piece! I had another product engineering brand and wasn’t happy with how little consideration for flow there was in the machining process. This is going on a bbc with twins so it needs all the fuel. Thanks” -Wade Part# MMCFIT0312