Wehrli Custom Fabrication WCF100224-CSTM Auxiliary Coolant Tank - Whiskey Bronze

The Wehrli Custom Fabrication WCF100224-CSTM is a fabricated aluminum auxiliary coolant tank kit designed to replace the factory clear plastic coolant reservoir on L5P Duramax trucks. Finished in a custom Whiskey Bronze powder coat (PPG color code PMB-10902), this tank is a direct OEM-location replacement that delivers a clean, high-end engine bay appearance without requiring any additional modifications to the truck.

Engineered specifically for the fuel cooling system, the tank features durable aluminum construction with a premium custom powder coat finish that resists heat and corrosion. The included black anodized CNC-machined billet aluminum cap adds a refined, purpose-built look while sealing the system reliably. All necessary mounting hardware is included for a straightforward installation using basic hand tools.

Kit Includes:

• Fabricated aluminum auxiliary coolant tank for fuel cooler
• Black anodized CNC-machined billet aluminum cap
• Overflow flow fitting
• Preformed hose
• Custom Whiskey Bronze powder coat finish (PPG PMB-10902)
• Mounting hardware

The tank mounts in the factory OEM location using existing mounting points, making installation straightforward and compatible with stock trucks. The -CSTM suffix denotes a custom color order — the Whiskey Bronze finish is a made-to-order powder coat option with an extended production lead time compared to stocked color variants. This is a USA-made part from Wehrli Custom Fabrication, a manufacturer known for precision-fabricated diesel performance and dress-up components.