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The WCFab thermostat housing for 2017–2025 6.6L L5P Duramax is a direct replacement that cleans up the engine bay while matching other WCFab components. Powder-coated in your color choice, it complements WCFab Upper Coolant Pipes, Intake Kits and Coolant Tanks. It installs as a drop-in replacement for the OEM housing and is intended to restore a neater appearance while maintaining stock coolant routing.
Wehrli L5P Duramax Thermostat Housing - Bengal Blue
