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The Wehrli auxiliary coolant tank kit for 2020–2025 Duramax L5P swaps the factory plastic reservoir for a fabricated aluminum tank in Brizzle Blue. It uses OEM mounting points and includes a black anodized CNC billet cap, necessary mounting hardware, a preformed hose and an overflow flow fitting. The direct-fit design works with stock trucks and installs with basic hand tools.
Wehrli 20-24 Duramax L5P Auxiliary Coolant Tank Kit - Brizzle Blue
