Oil coolers with a thermostat fitted give a big advantage to their engines compared to those without. Optimum oil and consequently engine operating temperature is achieved much faster with a thermostat fitted. These die-cast aluminum oil filter mounts with integrated thermostat are a perfect solution and are easy to fit. Attaches to the stock oil filter mount with the provided adapter and has angled oil line fittings. Note: Due to limited space on Twin Cam models this thermostat must be used with ZPN121192 oil filter.