ProGuard D2 Fuel Filters deliver increased flow and efficiency that are demanded in the Diesel environment. This fuel filter is designed for maximum filtration and minimal flow restriction. The ProGuard D2 Fuel Filters are direct OE replacements filters which utilize the factory canisters to ensure a proper fit and hassle-free installation. This is the fuel filter element only that is mounted below the driver's door along the frame rail. It includes the o-ring seal for the canister.