Moroso 63440 - Restrictors, Water Outlet

Water Outlet Restrictor Kit 3 Restrictor Plates 5/8 in./0.75 in./1 in. ID 2 1/8 in. OD GM V6/V8 Eng./Ford 260-302/351W Eng. Anodized Aluminum • Restricting coolant flow leaving the engine lets you control the amount of heat absorbed by the coolant • Red, gold, and blue anodized aluminum restrictor plates are mounted under the water outlet on the intake manifold • Kit consists of three restrictor plates with 5/8", 3/4", and 1" I.D. holes for optimum coolant flow, 1-1/8" O.D.