Russell Performance -4 AN Female to -6 AN Male B-Nut Expander

This fitting gives you a -4 AN female connection on one side and a -6 AN male B-nut connection on the other. It's made from lightweight 6061-T6 aluminum and has a blue anodized finish to help it look good and resist corrosion. This type of adapter is really handy when you need to connect components that use different AN fitting sizes, like hooking up a fuel pump or oil pump to a fuel line or oil line that uses a different AN size.

The precision machining ensures a positive seal, even at high operating pressures, which is important for fuel and oil systems. It's a straightforward piece that helps you adapt your plumbing exactly how you need it for a custom setup.