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The Wehrli auxiliary coolant tank kit for 2020–2025 Duramax L5P replaces the stock plastic auxiliary reservoir with a fabricated aluminum tank finished in Bengal Red. It mounts using the OEM locations and includes a black anodized CNC billet cap, mounting hardware, preformed hose and overflow fitting. Built for direct fitment on stock trucks, the kit installs easily with basic hand tools.
Wehrli 20-24 Duramax L5P Auxiliary Coolant Tank Kit - Bengal Red
