The Donaldson 4.21" Spin-On Coolant Filter is designed to provide superior protection for your Volvo diesel engine. This filter is constructed with heavy duty hydrogenated nitrile butadiene rubber seals to withstand extreme cold and heat. It is a direct replacement to standard OE filters with no system modifications or special maintenance required. It helps maintain healthy coolant condition through a controlled release of additives, reducing maintenance costs and extending traditional diesel engine coolant maintenance intervals. FleetPride is your First Click in Heavy Duty®.