Keep your cool. This easy to install Oil Cooler features a thermostatically controlled fan that provides continuous flow of cooling air - even while the bike is idling in traffic or moving at low speed. Ideal for bikes that see parade duty and other low speed or continuous idle situations, the Fan Assisted Oil Cooler is also the perfect addition to a bike modified with high performance components. The fan automatically engages when the engine oil temperature rises, and when in operation, the Fan Assisted Oil Cooler can provide up to a 50 degree drop in oil temperature. And unlike other models, the Harley-Davidson® Fan Assisted Oil Cooler utilizes weather-rated fans and electronics that are designed for the harsh motorcycle environment. Engineered as a bolt-on replacement for the Original Equipment oil cooler, the Fan Assisted Oil Cooler is plug-and-play compatible with your bike's wiring harness. No splicing or rewiring is required.