This neck allows you to fill your cooling system at the intake manifold if you radiator is lower than the intake. It can be flipped over for RH or LH upper hoses, and has two 1/4" npt and one 1/2" npt hole in the back for bypass lines or sending units. Fill cap plate has a 7/16" pipe nipple welded into the overflow area.
Fits Small Block or Big Block Chevy V8.
This filler neck is garage sale priced because it has been installed and returned.
NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS