WCFab X PPE2020-2025 L5P Duramax High-Capacity Cast Aluminum Engine Oil Pans are a great performanceupgrade to replace the the poorly draining stock steel oil pan with aflat bottom high capacity version. Yourstock Duramax lower oil pan has a valley in the design which sits below the drain hole andholdsmore than half a quart of your dirtiest oil andimmediately contaminatesfresh oil after a fill.
