No thermostat, can be used as a sight glass.<br><br>Cool-View universal inline thermostat assembly designed to be placed inline of an 1 inch radiator hose it can fit most engines. Comes assembled and tested with either a 180F or 195F thermostat installed, or none at all. This unit is machined the same as a standard Chevy manifold to allow any Chevy thermostat housing to be used with the unit. This allows many options for plumbing the radiator hose.<br>Fits 1 inch radiator hose. Ideal for 38-48 and 49-53 Ford flathead engines (2 required). Can be made to fit different size hoses by using rubber bushings or reducers.<br>Assembly is 3 inches long from hose end to thermostat mounting face. Thermostat housing Bolts and thermostat housing not included.<br><br>Placed between the thermostat housing and manifold, Cool-View allows you to see the engine coolant's condition and the thermostat's position while the engine is running. You can even detect a crack in the engine or blown head gasket because oil or bubbles usually surface in the coolant.<br><br>Features<br>For use with any Chevy thermostat housing<br>Pyrex glass construction creates unique appearance<br>Available with or without thermostat (i.e. housing only)<br>View open/closed thermostat position<br>Helps determine cooling system efficiency<br>Check coolant without removing radiator cap<br>Easier to change thermostat because coolant level is visible<br><br><br>