Installation Instructions for 555-51105

Water Restrictor Kit

Designed to restrict the flow of coolant for optimal temperature control and maximum power in RaceOnly Applications. This is achieved by selecting the disc that permits the water/coolant to remain in the block just long enough to absorb the heat and to remain in the radiator just long enough to dissipate the heat before it returns to the block. Used by professional engine builders. Color coded for easy identification. Includes a 5/8” (Gold), 3/4” (Blue) and 1” (Red) I.D. disc. Fits most AMC, Ford & GM V6,V8 engines with a 2-1/8” O.D. thermostat.