Manufacturer's Part Number:
Water Outlet Restrictors
Moroso Water Outlet Restrictor Kits
Summit Racing Part Number:
Water Outlet Restrictor Material:
Sold as a set of 3.
Set includes one 5/8 in., one 3/4 in., and one 1 in. restrictor plate.
Choose In-store pick-up (OH, GA, NV) on our web site.
Restricting the amount of coolant flow leaving the engine lets you control the amount of heat absorbed by the coolant. These kits include three restrictor plates with 5/8 in., 3/4 in., and 1 in. i.d. holes. These plates are mounted under the water outlet on the intake manifold.