Heater Core Block Off Manual Valve 3/8" NPT 90 Deg Intake Manifold to 5/8" Hose

block core heater hose intake manifold valve

New Four Seasons manual heater valve.This valve has a 3/8" NPT end and a 3/4" OD barb (For 3/4" ID heater hose). Blocking your heater core flow will provide better A/C cooling on vehicles not equipped with a heater core bypass valve.