Manufactured by Robert Shaw and modified by Stewart, these custom thermostats feature a balanced sleeve design and are designed for high flow, high RPM applications. Strongly recommended for any performance application- must be used with Stewart Stage 2, 3, or 4 water pumps. Refer to our Tech Tips page for information on which thermostat is right for your application.
Fits Most Domestic Apps.
Modified 2 1/8" Dia.