Moroso 63440 - Water Outlet Restrictor Kit

• 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, 2-1/8" O.D.