Night-Pager Water Bypass Kit For 86 / BRZ

It is a part that stabilizes the water temperature by bypassing the cooling water from the heater hose out, where the heat of the cooling water tends to accumulate, to the radiator upper hose, and reduces the amount of cooling water circulation and water flow resistance. This bypass function stabilizes the temperature of the rear cylinder, where heat tends to accumulate, and prevents heat dripping and overheating of the engine while controlling the rise in water temperature. It is a part that is more effective when used together with a cooling thermostat.