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The Wehrli auxiliary coolant tank kit for 2020–2025 Duramax L5P replaces the stock plastic tank with a fabricated aluminum unit in Gun Metal. It mounts to OEM locations and includes a black anodized CNC billet cap, mounting hardware, preformed hose and overflow fitting. Designed for direct fitment on stock trucks, the kit installs with basic hand tools without additional modifications.
Wehrli 20-24 Duramax L5P Auxiliary Coolant Tank Kit - Gun Metal
