4000 Oil cooler bypass valve. Manual

Managing engine temperature is crucial for the longevity of any air-cooled V-twin, and this Jagg manual oil cooler bypass valve gives you total control. This valve allows you to manually bypass the oil cooler, which is particularly useful in colder climates or during short rides where you want the engine oil to reach operating temperature quickly. By preventing over-cooling, you ensure the oil maintains the correct viscosity for optimal lubrication. It features a simple in-line installation that works with almost any oil cooler setup and fits all Harley-Davidson models. It is a straightforward, mechanical solution for the rider who wants to actively manage their bike's thermal efficiency regardless of the weather conditions.