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The Wehrli auxiliary coolant tank kit for 2020–2025 Duramax L5P upgrades the OEM plastic reservoir to a fabricated aluminum tank in Gloss Black. It uses factory mounting points, installs in the original location and includes a black anodized CNC billet cap, mounting hardware, preformed hose and overflow fitting. The direct-fit design makes installation straightforward with basic hand tools.
Wehrli 20-24 Duramax L5P Auxiliary Coolant Tank Kit - Gloss Black
