Catalog / Cooling / Water Necks & Spacers / Water Outlet Restrictors, 2-1/8 in OD, 5/8 in 3/4 in 1 in ID, Aluminum, Blue / Gold / Red Anodized, Small Block Ford / GM V6 / V8, Set of 3
Water restrictors reduce the coolant flow leaving the engine
Controls the amount of heat absorbed by coolant
Kit consists of three anodized aluminum plates with 5/8", 3/4" and 1" inside diameter holes
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