This type of carb heat uses a cast collar that is press fit to the body of the carburator. Installation requires a hydraulic press. A hollow cast collar is then connected to the liquid cooling "water" / EVANS NPT hoses of the engine. A small diameter rubber hose connects both carburator collars in series and the coolant exits the collar to the engine return line by the coolant collector jug on top of the engine. This picture shows the coolant line exiting the carb heat collar to the coolant line connected to the collector jug. Sold by Light Engines Services Bob Robertson 250-832-8786 this kit provides a constant heat to the carb body without electrical load or burnt out associated with electric style heater or the expensive "tuned aluminum intake pipe" that CH750 builders have to cut apart to make fit the cowls.